The Pirates designated Light for assignment last Saturday. The reliever is a former first-round pick of the Red Sox and has tantalizing velocity, but he has long struggled with his control, as his 5.1 BB/9 this year for Triple-A Indianapolis suggests. The 26-year-old pitched briefly in the big leagues for the Red Sox and Twins last season and allowed 22 runs in 16 2/3 innings, though he did average 95 MPH with his fastball.
The Mariners selected the 28-year-old Harper’s contract late last month, then optioned him to Tacoma before he threw a pitch for them. He has pitched parts of seven seasons in the minors but has never appeared in a big-league game despite having been on a big-league roster and being part of a trade for a big-leaguer (the 2015 deal that sent Jose Ramirez to Atlanta). He has, however, fared well this season for Tacoma, posting a 3.00 ERA, 10.9 K/9 and 4.5 BB/9 24 innings there.