What happened: Spencer Schwellenbach is back with the club in Cobb County as he increases his baseball activity, Mark Bowman says. The latest work follows four bullpen sessions in Florida.

Why it matters: A September return would add a rotation option for the stretch run. It could also create a bullpen role as the club shapes its October staff.

What to watch: Facing live hitters is the next checkpoint. A rehab assignment would follow if his progression continues.