The Padres optioned Jacob to Triple-A El Paso on Tuesday.

The right-hander was called up by San Diego on July 12 and appeared in just one game during his time with the big club, as he covered two scoreless frames Sunday in Washington. It's otherwise been a struggle for Jacob in the majors this season with a 6.39 ERA, 1.70 WHIP and 19:10 K:BB over 25.1 innings.

The Nationals optioned Thompson to Triple-A Rochester on Tuesday.

In his first six relief appearances since completing his recovery from Tommy John surgery and returning from the 60-day injured list, Thompson has been tagged for six runs with a 3:6 K:BB over four innings. He will try to get back on track at Rochester.

The Nationals selected Pilkington's contract from Triple-A Rochester on Tuesday.

The lefty will provide length in the bullpen behind Tuesday's starter, Brad Lord, who is making his first start since early May after 26 consecutive relief appearances. Pilkington has posted a 2.59 ERA and 50:27 K:BB over 41.2 frames this season with Rochester.

The Mets reversed Waddell's optional assignment to Triple-A Syracuse and placed him on the 15-day injured list Tuesday due to a right hip impingement.

Waddell had been sent down to Syracuse over the weekend, but he didn't appear in any games for the affiliate and is thus eligible to be placed on the big club's injured list. The lefty will be eligible for activation Aug. 3, but it's not clear whether he will be ready to return on that date.

The Mets recalled Garza from Triple-A Syracuse on Tuesday.

The 31-year-old had a couple short stints with the Mets in June but has spent the past month with Syracuse. Garza has pitched in five games for New York this season and has given up four earned runs with a 3:1 K:BB across 6.2 innings.

The Mets designated Devenski for assignment Tuesday.

He'll give up his spot on the 40-man roster to another right-handed reliever in Rico Garcia, whom the Mets claimed off waivers from the Yankees. Devenski has done a fine job with the Mets this season, collecting a 2.38 ERA and 9:3 K:BB over 11.1 innings. If he isn't claimed off waivers, Devenski will have the ability to elect free agency rather than accepting an outright assignment to Triple-A Syracuse.

The Mets optioned Herget to Triple-A Syracuse on Tuesday.

The right-hander was added to the big-league roster over the weekend and will head back to the minors after firing 2.1 scoreless frames Monday against the Angels. Herget has allowed one earned run with a 1:2 K:BB over 5.1 innings in the majors between Atlanta and New York this season.

The Giants recalled Seymour from Triple-A Sacramento on Tuesday.

The right-hander was sent down to Triple-A in early July after giving up two earned runs over four frames in his first two MLB appearances, but he'll rejoin San Francisco early on in the second half. Seymour has primarily worked as a starter at Sacramento this season and has a 3.86 ERA, 1.34 WHIP and 90:39 K:BB over 77 innings, so he could be a candidate to fill the rotation spot vacated by Hayden Birdsong, who was optioned to Triple-A in a corresponding move Tuesday. Until the Giants require a fifth starter again, Seymour might serve as a long man out of the bullpen.

The Giants recalled Hjelle from Triple-A Sacramento on Tuesday, Shayna Rubin of the San Francisco Chronicle reports.

Hjelle has struggled in 12 innings with the Giants this season, yielding nine runs with a 9:8 K:BB. However, he's pitched well at Sacramento (2.90 ERA, 44:10 K:BB in 40.1 frames), and he will give the big club a fresh bullpen arm heading into Tuesday's game against Atlanta.

The Giants optioned Beck to Triple-A Sacramento on Tuesday, Shayna Rubin of the San Francisco Chronicle reports.

Beck was needed for 1.1 innings out of the bullpen in Monday's loss to Atlanta, so he's being sent out to the minors in favor of fresh relief help. The righty has pitched exclusively in relief this season and presumably will remain in the bullpen at Sacramento.