Butler tweets apology for vulgar t-shirt

Chicago Bulls guard Jimmy Butler tweeted an apology on Tuesday for a photo on the Internet of him wearing a t-shirt with a vulgar phrase from a song by rapper Lil' Wayne.

"In regards to the picture that is circulating... It was early last year and the shirt simply matched my shoes," Butler tweeted. "In no way do I support the message written on the shirt. I sincerely apologize to any of my fans who may have been offended. Much love, JB."

Butler, a first-round draft pick in 2011, emerged as a key player for Chicago in his second season and will be the starting shooting guard going into next season, according to coach Tom Thibodeau.