Phillies prospect Tyson Gillies was suspended last week for what was only termed a "violation of team rules." The offending incident specifically involved a confrontation between double-A Reading's bus driver and Gillies, according to a team source.

Gillies was emotional, the source said, because he had re-injured his troublesome hamstring just days after returning from a concussion that sidelined him for seven weeks. Gillies verbally berated the bus driver but did not physically harm him.

In an email to his hometown newspaper, The Kamloops (B.C.) Daily News, Gillies apologized for the incident.

"What I did was wrong," Gillies, 23, told the paper. "I let my emotions get the best of me and said some things to our bus driver that I shouldn't have."

The Phillies have not said how long Gillies' suspension will last. More worrisome is yet another injury to the speedster's legs.

Gillies, acquired in the much-maligned Cliff Lee trade, has played only 31 minor-league games over the past two seasons. He was hitting .291 with an .806 OPS in 44 games for Reading in 2012. His "prospect" status is waning.

Gillies was arrested for cocaine possession in 2010 while rehabbing in Clearwater, Fla., but those charges were later dropped.

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