Berrios, 21, has posted a 27/1 strikeout-to-walk ratio in 20 innings in his last three starts, and considering he has less than 150 innings under his belt this season -- after logging 140 frames in 2014 -- there shouldn't be any concerns about his workload if the Twins were to promote him in September. He currently leads all Minor Leaguers with 153 strikeouts.
The rest of the 10 best performances from top Minor Leaguers
• D-backs No. 4 prospect (No. 88 overall) Braden Shipley continued his second-half resurgence Friday with seven strong innings for Double-A Mobile in a 2-1 eight-inning loss to Jacksonville.