Minor MLB Transactions: 5/15/17

We’ll track the day’s minor moves in this post. The latest:

• The Diamondbacks have purchased the contract of lefty Aaron Laffey, per an announcement from the Somerset Patriots. Laffey had been working for the indy ball club, throwing 22 1/3 innings of 2.82 ERA ball. The 32-year-old spent last year as a Triple-A swingman in the Nationals organization after briefly cracking the majors with the Rockies in 2015.  He had compiled a much more extensive MLB track record before that, though, appearing in seven straight campaigns as a starter and/or reliever beginning in 2007. All told, Laffey carries a 4.44 ERA with 4.5 K/9 against 3.6 BB/9 across 494 1/3 big league innings.
• The Marlins have outrighted infielder Yefri Perez to Double-A, per a club announcement. Perez, 26, lost his roster spot recently to make room for the addition of veteran Mike Aviles. Though he made it to the majors briefly last season, Perez is still in need of quite a bit of seasoning. He has swiped as many as 73 bases in a single minor-league season, though it’s hardly clear he’ll ever reach base enough to hold on in the big leagues. Through 123 plate appearances this year at Double-A, he’s carrying a meager .131/.283/.162 batting line.