Jerez was an interesting view in this game, working one inning. Originally drafted by the Red Sox in the second round of the 2011 MLB Draft out of Grand Street Campus H.S. (Brooklyn, N.Y.) as an outfielder, he converted to the mound in 2014 as a pure reliever, and he has developed into a power-armed lefty that’s worth following. Jerez showed a double-plus fastball sitting 95-to-97 mph with most readings at 96 mph and a potentially above-average slider that comes in short but with hard bite and some tilt at 88-to-90 mph. The fastball command comes and goes, but it comes in with run bore and tail and he can locate it to both sides of the plate with plus life, making it an easy plus offering. His control profile is improving, dropping his BB/9 to an above-average 2.84 BB/9 this year, down from a well-below-average 4.15 BB/9 last year, which is an encouraging trend given his 2014 conversion. In spite of his age, he still needs development innings and time to refine the arsenal, and dial in the control. He’s thrown a light 148-plus innings at the Double-A level, but with a plus fastball and above-average slider, and with the control numbers trending in the right direction, he has the makings of a realistic Role 50, average seventh-inning reliever.