Woodruff had a capsular tear an injury that is often the beginning to the end of careers; Jimmy Nelson, Johan Santana, Mark Prior etc. That he’s back and getting outs with diminished velocity speaks to his skill as a pitcher and the effort he put into his recovery which is a lot less certain than those recovering from the much more predictable Tommy John surgery.
Given his effort, and ability to learn to pitch without overwhelming stuff, I hope the Brewers keep him around for as long as he’s willing, because those are the exact kind of traits you want to rub off on all their young arms.