Simmons is coming back from Tommy John surgery. It's good to see that the setback was only minor, and he should be back on the mound soon. A return before the All Star Break is likely, barring any setbacks.
Ross has been out since early-April with a shoulder injury. Progress has been very slow thus far and it's hard to see him returning in June.
The 24-year old has yet to play in the big leagues this season, though he's hit well in Triple-A. He spent time on the DL with a hamstring injury.
Hendricks has been out since early May with elbow soreness. He's really struggled this season, but hopefully the time off will help. He could be back in mid-June.
Adams left Thursday's game with a back issue, but his removal was only cautionary and he should be fine going forward.
Elliott was an undrafted free agent who spent time with the Steelers earlier this month but was not signed to a contract. He'll join the Buccaneers along with McFadden, a 25-year old who played with the Falcons in 2015.