Rodriguez was unavailable for Sunday's 4-3 win against the Brewers due to right arm soreness, Shayna Rubin of the San Francisco Chronicle reports.

Rodriguez was tagged with the loss in Friday's 5-4 defeat in Milwaukee, and he apparently torqued something in his pitching arm in the process. Ryan Walker was called upon to protect the Giants' one-run lead in the ninth inning Sunday, working around a two-out single by Sal Frelick to earn a save. Rodriguez still appears to be in the driver's seat for the ninth-inning role with San Francisco, and he can be considered day-to-day ahead of Monday's off day.

The Brewers optioned Rodriguez to Triple-A Nashville on Sunday.

Rodriguez was called up by Milwaukee on Wednesday and will return to Triple-A after giving up four runs over three frames out of the bullpen during Saturday's 7-1 loss to the Giants in his second MLB appearance of the season. He's now surrendered seven runs across his two long-relief outings for Milwaukee.

The Cardinals optioned Veneziano to Triple-A Memphis on Sunday.

Veneziano will cede his spot in the St. Louis bullpen to John King (oblique), who was activated from the 15-day injured list. After being called up from Memphis last Sunday, Veneziano made two relief appearances for the Cardinals and gave up two earned runs on three hits and one walk over four innings.

The Cardinals activated King (oblique) from the 15-day injured list Sunday.

St. Louis optioned reliever Anthony Veneziano to Triple-A Memphis to clear room in the bullpen for King, who had been shelved since July 30 due to a left oblique strain. Prior to going down with the injury, King had notched two wins and two holds while delivering a 5.18 ERA, 1.63 WHIP and 24:13 K:BB across 41.2 innings in 43 appearances.

Lucchesi threw a scoreless inning in Saturday's 7-1 win over the Brewers, allowing one hit.

Lucchesi entered the game in the seventh, giving up a single and throwing seven of his 12 pitches for strikes. The 32-year-old has appeared in nine games this month, recording a 9.39 ERA, 2.22 WHIP and a 4:4 K:BB in 7.2 innings. Overall, he owns a 3.96 ERA, 1.24 WHIP and a 21:6 K:BB across 25 innings in 25 games.

Colorado transferred Darnell (hip) to the 60-day IL on Sunday.

The Rockies placed Darnell on the 15-day IL on Friday due to left hip inflammation, an injury that interim manager Warren Schaeffer acknowledged that the reliever had been dealing with "for a while," per MLB.com. While the Rockies haven't revealed that Darnell is dealing with anything more significant than swelling in the hip, the club evidently determined that the right-hander wasn't on track to return before the end of the season. Darnell will close his rookie campaign with a 3.86 ERA, 1.46 WHIP and 5:7 K:BB in 11.2 innings out of the Colorado bullpen.

The Rockies optioned Gilbreath to Triple-A Albuquerque on Sunday.

Gilbreath's stay with the big club lasted just two days, with the reliever making his lone appearance in Friday's 9-0 loss to Pittsburgh. He'll cede his spot on the 26-man active roster to right-hander McCade Brown, who was called up from Double-A Hartford to start Sunday's series finale versus the Pirates.

Atlanta placed Bummer on the 15-day injured list Sunday due to left shoulder inflammation.

The left-hander threw 1.1 scoreless innings Saturday against the Mets, which is presumably when he suffered the injury since that was his first appearance in nearly a week. Bummer will be eligible to be reinstated Sept. 8, though it's unclear if he's expected to be healthy by that point.

Atlanta recalled Stratton from Triple-A Gwinnett on Sunday.

The veteran right-hander was optioned to Gwinnett on Tuesday but will quickly return to Atlanta with Aaron Bummer (shoulder) landing on the injured list. Stratton has given up seven earned runs over 8.2 innings in the majors this year and should fill a low-leverage relief role.

Atlanta recalled Suero from Triple-A Gwinnett on Sunday.

The right-hander was optioned to Gwinnett in late July and will make his return to Atlanta a month later. Suero has surrendered six earned runs over five frames in the majors this year but has a 1.39 ERA in 42 relief appearances at Triple-A.