Jonathan Singleton, the ascending first base power prospect the Phillies sent to the Astros as part of the 2011 Hunter Pence deal, tested positive for marijuana, he said in a statement released Wednesday, according to MLB.com.

It's a 50-game suspension for Singleton, now a two-time offender. Singleton was the centerpiece of the 2011 Phillies trade with Houston for Pence. The 20-year-old lefty hit .298/.392/.441 the year of the trade, and this past season hit .284 with a .396 OBP and .497 slugging percentage in his first full season in the Astros' system with Double A Corpus Christie.

"I accept the penalty and take full responsibility for my actions," Singleton said. "I apologize to my parents, the Houston Astros and [general manager] Jeff Luhnow.



"The Astros have been nothing but supportive of me and good to me in my short time with the organization. My hope is to use this as a learning experience and spend the rest of my career proving to myself and the baseball community that this was a lapse in judgment, and is not in any way indicative of my character or my dedication to baseball or to my team."

Players on the 40-man rosters of big-league teams are not tested for marijuana, as pointed out by HardballTalk. Singleton, though, wasn't on Houston's 40-man roster.

Singleton was the minors' 34th-best prospect prior to 2012, as rated by Baseball America. Five spots up from No. 39 the previous year. ESPN's Keith Law has him as Houston's second-best prospect.