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Waldron will serve as the opening pitcher in Wednesday's game against Colorado, Mark Zuckerman of NatsJournal.com reports.
Waldron was claimed off waivers from Toronto on Saturday, and he's now set to make his Nationals debut in the first inning of Wednesday's contest. The 29-year-old righty owns an unsightly 7.54 ERA and 1.62 WHIP through 37 innings in the majors this season and will likely pitch just an inning or two before coming out of the game.
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Nationals' Matt Waldron: Claimed by Nats
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The Nationals claimed Waldron off waivers from the Blue Jays on Saturday.
Waldron has put up a 7.54 ERA and 1.62 WHIP over 37 innings in the majors this season between San Diego and Toronto, but the Nationals will pick him up anyway to add a multi-inning arm to their bullpen. Connelly Early (elbow) was transferred to the 60-day IL to create room for Waldron on the 40-man roster.
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Blue Jays' Matt Waldron: DFA'd by Toronto
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The Blue Jays designated Waldron for assignment Wednesday.
Waldron has been jettisoned from the 26-man and 40-man rosters for Brendan Cellucci, whose contract was selected from Triple-A Buffalo in a corresponding move. Waldron was claimed off waivers from the Padres on Aug. 5 and pitched in four games out of the Toronto bullpen, allowing five runs on seven hits and two walks with three strikeouts across 4.1 frames.
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Blue Jays' Matt Waldron: Waiver pickup for Jays
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The Blue Jays claimed Waldron off waivers from the Padres on Wednesday.
Waldron will presumably slot into the bullpen in Toronto, where he'll provide the team with a right-handed arm capable of covering multiple innings. Toronto transferred lefty Patrick Corbin (shoulder) from the 15-day injured list to the 60-day IL in order to clear room on the 40-man roster for Waldron, who recorded a 7.16 ERA and 1.56 WHIP in 32.2 innings with San Diego this season.
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Padres' Matt Waldron: Dropped from 40-man roster
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The Padres designated Waldron for assignment Wednesday.
The Padres needed to clear room for Jeremiah Estrada's (knee) return from the injured list, and because he doesn't have any minor-league options remaining, Waldron was dropped from the 40-man roster to facilitate the transaction. Waldron was a serviceable back-end starter for the Padres in 2024 but has seen his effectiveness wane in the two seasons since while also missing considerable time due to injuries. In 10 appearances (three starts) for San Diego this season, Waldron turned in a 7.16 ERA and 1.56 WHIP across 32.2 innings.
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Padres' Matt Waldron: Activated from IL
Rotowire
The Padres reinstated Waldron (forearm) from the injured list Saturday.
A forearm strain has kept Waldron on the injured list since mid-May, but he has been playing in rehab games at Triple-A El Paso since June 14. The 29-year-old gave up four earned runs while striking out 10 batters in 15 innings across five appearances during his time in the minors. The Padres don't currently have a spot open for him in the rotation, so he figures to work out of the bullpen as a long reliever for the time being.
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Padres' Matt Waldron: Covers four innings in rehab start
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Waldron (forearm) struck out one batter while allowing one run on eight hits and no walks over four innings in a rehab start Wednesday with Triple-A El Paso.
Making the fourth start of his rehab assignment as he works his way back from a right brachialis strain, Waldron got stretched out to 60 pitches and threw 42 strikes. Waldron is slated to make another start for El Paso on Tuesday, which could set the stage for him to return from the 15-day injured list later this weekend or immediately following the All-Star break. San Diego may not have a spot available in its rotation for Waldron, so he could serve as a long reliever once he's activated.
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Padres' Matt Waldron: Makes third rehab appearance
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Waldron (forearm) struck out four and allowed two earned runs on two hits and four walks across 2.2 innings Thursday in a rehab start with Triple-A El Paso.
Waldron has now made three rehab starts with El Paso and built up to 59 pitches during Thursday's outing. Though the Padres are seemingly letting Waldron get stretched back out as a starter, he may need to show improved results on the farm in order to get a look in the big-league rotation.
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Padres' Matt Waldron: Begins rehab assignment
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Waldron (forearm) made his first rehab appearance with Triple-A El Paso on Sunday, tossing 2.1 scoreless innings.
Waldron breezed through his 2.1 frames on 27 pitches, yielding just one hit. It was Waldron's first outing in exactly one month, as he's working his way back from a right brachialis muscle injury. If the knuckleballer is added back to the major-league roster at the conclusion of his rehab assignment, he is expected to be used in a relief role.
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Padres' Matt Waldron: Getting closer to rehab assignment
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Waldron (forearm) is scheduled to throw two innings of a bullpen session Tuesday and is on track to start a rehab assignment with Triple-A El Paso this Sunday, Jeff Sanders of The San Diego Union-Tribune reports.
Waldron landed on the 15-day injured list in mid-May due to a right brachialis muscle injury, his second stint on the IL this season. He's progressed enough in his recovery to close in on a rehab assignment, and he could back with the big club after a couple of outings in the minors. When he returns to the majors, Waldron will likely operate out of the Padres' bullpen after Lucas Giolito was added to the rotation.
Waldron (forearm) could take on a bullpen role when he returns from the 15-day injured list, MLB.com reports.
Waldron landed on the IL last Friday due to a right brachialis muscle injury. He had initially been slated to be designated for assignment, as Waldron lost hold of his spot in the rotation after Lucas Giolito was cleared to make his team debut. If Waldron remains with the club after he gets healthy, he'll likely be asked to work out of the bullpen, barring injuries to other starters reopening a spot in the rotation. Over six appearances (three starts) with San Diego so far in 2026, Waldron has posted a 8.49 ERA and 1.71 WHIP over 23.1 innings.
The Padres placed Waldron on the 15-day injured list Friday due to a right brachialis muscle injury.
Waldron was initially DFA'd by the Padres earlier in the day, but he'll instead go on the injured list with a forearm injury. It's his second stint on the 15-day IL this season, with a lower-body injury causing him to miss the first three weeks of the 2026 campaign. Right-hander Alek Jacob was recalled from Triple-A El Paso in a corresponding move.
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Padres' Matt Waldron: Removed from 40-man roster
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The Padres designated Waldron for assignment Friday, Kevin Acee of The San Diego Union-Tribune reports.
Waldron has failed to gain much traction with the Padres the last two seasons, posting an 8.36 ERA and 25:13 K:BB over 28 innings covering four starts and three relief outings. The knuckleballer has a chance to clear waivers, and if that happens, he could stick around as swingman depth at Triple-A El Paso.
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Padres' Matt Waldron: Roughed up in bulk relief
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Waldron (1-2) took the loss against Milwaukee on Tuesday, allowing six runs on eight hits and two walks while striking out three batters over 2.2 innings.
Bradgley Rodriguez opened the game for San Diego and tossed a scoreless inning. Waldron entered in the second frame and did fine intially, but he gave up a run in the third. Things got much worse for the knuckleballer in the fourth, as the Brewers tagged him for five runs on eight hits and a walk before he exited with two outs. Waldron's season ERA ballooned to 9.28 as a result of the poor outing. He may not remain in the team's rotation plans for long -- either as a starter or in bulk relief -- with Lucas Giolito closing in on his team debut.
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Padres' Matt Waldron: Following opener again
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Waldron is slated to serve as the Padres' primary pitcher in Tuesday's game versus the Brewers, Kevin Acee of The San Diego Union-Tribune reports.
Waldron struck out seven over five innings of one-run ball against the Giants on Wednesday after following opener Bradgley Rodriguez. The Padres will follow that same formula again in Tuesday's series opener. Waldron is not guaranteed any more starts beyond Tuesday's, as Lucas Giolito is expected to be ready to join the rotation soon after knocking off some rust in the minors.
Waldron (1-1) earned the win Wednesday over San Francisco, allowing a run on two hits and no walks over five innings. He struck out seven.
After struggling to a 9.88 ERA over his first three starts this year, the Padres elected to use an opener ahead of Waldron on Wednesday. The move paid immediate dividends, as Waldron was nearly untouchable in the San Diego victory -- the Giants' lone run came on a Rafael Devers solo homer in the fifth. Despite Wednesday's performance, it remains to be seen what Waldron's role will be going forward, as Lucas Giolito is expected to join the rotation soon.
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