In Sanburn, the Sox will acquire a right-hander that ranked 12th on MLB.com’s midseason list of top 20 Athletics prospects. The 23-year-old was Oakland’s second-round pick back in 2012 and has pitched to a 3.28 ERA with 9.2 K/9 and 3.2 BB/9 in 71 1/3 relief innings at Class-A Advanced this season. He’s finished 23 games and picked up six saves in his time at Stockton.
Sanburn has been plagued by some shoulder issues, but he also has less mileage on his arm than many pitching prospects due to the fact that he was an outfielder in college and for part of his time in college at Arkansas. Jim Callis and Jonathan Mayo of MLB.com note in their free scouting report that Sanburn touched 99 mph in college and offers a curveball with good depth as well. The MLB.com duo notes that Sanburn has a promising slider and changeup as well, but concerns over his durability have led to a bullpen role this season in Oakland.
Per mlbrumors