Astros Designate Paul Clemens, David Martinez

The Astros announced that they have designated right-handers Paul Clemens and David Martinez for assignment in order to make room on their 40-man roster for September callups. Righties Jorge De Leon and Nick Tropeano each had their contracts selected, necessitating corresponding 40-man moves. Additionally, catcher Max Stassi, outfielder L.J. Hoes and shortsop Jonathan Villar have been recalled, while lefty Darin Downs has been activated from the DL and waiver claim Sam Deduno has been added to the active roster.

Clemens, 26, has mopped up 98 innings for the Astros over the past two seasons and posted a 5.51 ERA with 6.0 K/9, 3.6 BB/9 and a 36.9 percent ground-ball rate in the process. Though he posted strong numbers through Double-A in his minor league career, he stumbled at Triple-A and has recorded a combined 5.91 ERA in 182 2/3 innings over parts of four seasons at that level.

The 27-year-old Martinez has logged 18 1/3 innings with Houston over the past two seasons with a 6.38 ERA and a 12-to-5 K/BB ratio in that time. He, too, has struggled at Triple-A, posting a 6.03 ERA over his two seasons (94 innings) with Oklahoma City.

Tropeano is the most notable prospect of the bunch, ranking 13th among Astros prospects on the midseason list compiled by Jonathan Mayo and Jim Callis of MLB.com. The 2011 fifth-round pick pitched to a 3.03 ERA with 8.7 K/9 and 2.4 BB/9 in 124 2/3 innings as a member of Triple-A Oklahoma City’s rotation this year. Callis and Mayo note that his low-90s fastball and changeup give him two above-average offerings, and his slider has the potential to be above-average as well. With the potential for three above-average offerings, Tropeano would seem to have a shot at being a rotation member in the future.