San Diego Padres outfielder Cameron Maybin was suspended 25 games without pay after testing positive for an amphetamine in violation of Major League Baseball's Joint Drug Prevention and Treatment Program.

The suspension was effective immediately, and the Padres purchased the contract of outfielder Jeff Francoeur from Triple-A El Paso.

"I have been undergoing treatment for several years for a medical condition, Attention Deficit Disorder (ADD), for which I previously had a Therapeutic Use Exemption (TUE)," Maybin said in a statement. "Unfortunately, in my attempts to switch back to a medicine that had been previously ok'd, I neglected to follow all the rules and as a result I tested positive. I want to assure everyone that this was a genuine effort to treat my condition and I was not trying in any way to gain an advantage in my baseball career. I understand that I must accept responsibility for this mistake and I will take my punishment and will not challenge my suspension. I apologize to my family, friends, fans, teammates, and the entire Padres organization. I look forward to returning to the field and contributing to the success of my club."

Maybin is hitting just .247 in 174 at-bats this season, appearing in 62 games. He has one home run and nine RBIs to go with three stolen bases.

Francoeur was in the starting lineup for the Padres' game against the Chicago Cubs at Wrigley Field on Wednesday, and hit a two-run double in the first inning. The 30-year-old was released by the Cleveland Indians during the final week of spring training and signed a minor-league deal with the Padres on March 25.

He was hitting .294 with 15 home runs and 60 RBIs in 98 games with El Paso. Francoeur has a .263 career batting average in parts of nine seasons in the majors.