Bumgarner (shoulder) will throw a 20-pitch bullpen session Friday, Nick Piecoro of the Arizona Republic reports.

EDGE Analysis

If he comes through that without issue, then Bumgarner will throw in a game situation Monday, although the nature of that situation has not yet been defined -- simulated or rehab assignment. The left-hander threw 34 pitches over two innings in a sim game earlier this week.

Bumgarner (shoulder) threw 34 pitches over two innings in a simulated game Tuesday, MLB.com reports.

EDGE Analysis

Bumgarner has thrown two bullpen sessions and now a simulated game as the left-hander works his way back from shoulder inflammation that knocked him out of a start June 2. A rehab assignment is a certainty for Bumgarner to build up his pitch and inning counts.

Bumgarner (shoulder) threw a bullpen session Saturday, Nick Piecoro of the Arizona Republic reports.

EDGE Analysis

This is the second bullpen session this week that Bumgarner has thrown. Arizona manager Torey Lovullo said the left-hander will throw at least one more before taking the next step of facing hitters.

Bumgarner (shoulder) completed a 20-pitch bullpen session Monday, Nick Piecoro of the Arizona Republic reports.

EDGE Analysis

This was Bumgarner's first activity since being removed from a start June 2 with left shoulder discomfort after two innings. The left-hander will likely require a rehab assignment before rejoining the Diamondbacks' rotation.

Bumgarner (shoulder) has begun throwing, Zach Buchanan of The Athletic reports.

EDGE Analysis

It's unclear exactly what this entails, but he could simply be playing catch. Bumgarner is on the shelf with left shoulder inflammation and is without a timetable to return.

Bumgarner (shoulder) was placed on the 10-day injured list Thursday.

EDGE Analysis

Bumgarner was diagnosed with left shoulder inflammation after he underwent an MRI on Thursday. Although manager Torey Lovullo was initially optimistic about the southpaw's status, he'll miss at least one turn through the rotation while he recovers. Right-hander Humberto Castellanos was recalled from Triple-A Reno in a corresponding move and is expected to pitch out of the bullpen, while it's not yet clear who could fill Bumgarner's spot in the rotation.

Bumgarner's MRI on Thursday revealed left shoulder inflammation, Nick Piecoro of The Arizona Republic reports.

EDGE Analysis

Bumgarner will be shut down from throwing for a few days, but manager Torey Lovullo is optimistic that the southpaw isn't facing a lengthy absence, and he said that he could avoid a trip to the injured list. The left-hander had been dealing with shoulder discomfort over the past couple weeks, but the issue doesn't appear to be a significant concern for now. However, it's not yet clear when Bumgarner could return to the mound.

Bumgarner was removed from Wednesday's start against the Mets after two innings due to left shoulder discomfort and will undergo an MRI, Zach Buchanan of The Athletic reports. He gave up five runs on eight hits with two strikeouts and zero walks, and he didn't factor in the decision.

EDGE Analysis

The 31-year-old has surrendered at least five earned runs in each of his past three starts, and he's apparently been managing the discomfort over the past couple weeks, according to Bob Nightengale of USA Today. Regardless of the severity of the issue, Bumgarner seems likely to require at least a brief stint on the injured list given he's been unable to shake off the injury.

Bumgarner (4-5) was charged with the loss Friday against St. Louis, pitching four innings and giving up seven runs (six earned) on five hits and four walks while striking out four.

EDGE Analysis

The veteran southpaw struggled with both his command and control in the loss, tying season-worst marks by allowing a pair of home runs and four walks. Bumgarner induced only six swinging strikes across his four frames and suffered his third straight loss. Over a six-game stretch between April 18 and May 17, Bumgarner appeared to turn back the clock, posting a 1.32 ERA and 0.59 WHIP across 34 innings. He has fallen back to Earth across his past two starts, however, yielding 11 earned runs and a 6:4 K:BB across 10 frames. He'll try to get back on the winning track in his next outing, which is tentatively scheduled for Wednesday at home versus the Mets.

Bumgarner (4-4) took the loss Saturday at Colorado after giving up seven runs (five earned) on eight hits with two strikeouts and zero walks over six innings.

EDGE Analysis

The veteran lefty allowed only one earned run through the first five innings, but the Rockies tacked on four runs during the sixth inning to sour the performance. Bumgarner had surrendered five earned runs over his previous six starts (34 innings), and he'll attempt to get back on next time out versus the Cardinals.