Mayza (shoulder) progressed to throwing from 120 feet Wednesday, MLB.com reports.

Mayza has been sidelined since April 19 and is already eligible to be reinstated from the 60-day injured list. While this activity marks positive progress, he'll need to throw bullpen sessions and engage in a rehab assignment before being activated.

Borucki (back) resumed throwing bullpen sessions Wednesday, MLB.com reports.

Borucki has been sidelined since June 21, and this was his first reported progress since. He has no official timeline for a return, but he could be available shortly before or after the All-Star break.

Flexen didn't factor in the decision Saturday against the Cardinals after giving up one run on four hits and no walks over 3.2 innings as a bulk reliever. He struck out two.

Manager Craig Counsell said Friday that the veteran right-hander was a candidate to get stretched out after Jameson Taillon (calf) was placed on the injured list, and Flexen then pitched behind an opener Saturday. The 31-year-old has excelled as a relief option for the Cubs this year with a 0.83 ERA across 32.2 innings, and it appears he'll now get a look as a rotation piece. Flexen threw 64 pitches in Saturday's contest, and it's unclear if Chicago plans to utilize him as a traditional starter or keep him in the bulk role.

Helsley struck out one and didn't allow a baserunner in a scoreless ninth inning to earn the save Saturday against the Cubs.

Helsley entered for the ninth inning with a two-run cushion and needed just 11 pitches to retire the side in order. The right-hander has now converted his last four save chances and has given up one run with a 7:0 K:BB across his past six appearances.

Devenski will serve as the Mets' opening pitcher in a bullpen game Sunday against the Yankees, Mike Puma of the New York Post reports.

The Mets have multiple starters coming off the injured list next week, but the team will turn to Devenski and a slew of relievers to get them through Sunday's contest before an off day Monday. Devenski has not thrown more than two innings in an appearance this season at Triple-A or in the majors. Lefty Brandon Waddell is a candidate to pitch in bulk relief behind Devenski.

Alexander's contract was selected from Triple-A Sacramento on Saturday, John Shea of the San Francisco Chronicle reports.

Erik Miller was placed on the IL with a sprained elbow, and Alexander was summoned to serve as a lefty bullpen replacement. Alexander had a 13.50 ERA, 2.63 WHIP and 3:2 K:BB in 5.1 innings at Triple-A and gave up 11 earned runs in 16.1 innings with the Rockies earlier this year.

The Giants placed Miller on the 15-day injured list Saturday due to a left elbow sprain, John Shea of the San Francisco Chronicle reports.

Miller, a 27-year-old southpaw, has a 1.50 ERA, 1.47 WHIP and 22:20 K:BB in 30 innings this season. Lefty Scott Alexander was called up from Triple-A Sacramento to take Miller's place in the Giants bullpen.

The Giants optioned Black to Triple-A Sacramento on Saturday.

Black ran into some struggles on the mound during his season debut Friday, giving up five runs (three earned) while striking out five batters in four innings out of the bullpen. He'll now return to the minor leagues in favor of Tristan Beck, who will provide the Giants with an additional fresh bullpen arm.

The Giants recalled Beck from Triple-A Sacramento on Saturday.

Since being sent down to Triple-A on June 18, Beck has given up two unearned runs over 6.1 innings while striking out nine batters. He'll rejoin the big club Saturday to provide San Francisco with a fresh bullpen arm, replacing Mason Black.

Dodgers manager Dave Roberts said Friday that Casparius will probably be returning to the bullpen Sonja Chen of MLB.com reports.

Casparius has been working either as a primary pitcher behind an opener or as a traditional starter since mid-June, but he's struggled of late, posting a 9.77 ERA with a 1.79 WHIP over his past four outings spanning 15.2 frames. He yielded six runs over three innings against the Astros on Friday, which may have been the tipping point in terms of the Dodgers' decision to move him back to the bullpen. However, that transition may have been coming regardless of Casparius' results, as the team's decimated rotation is beginning to get healthy -- Tyler Glasnow (shoulder) is expected to return next week, and Blake Snell (shoulder) is nearing a rehab assignment. Los Angeles also has Emmet Sheehan as starting pitching depth in the minors, and he could be called up to start against the Astros on Sunday.