Brewers righthander Jeremy Jeffress, who began serving a 50-game suspension last season after testing positive for "a substance of abuse," checked into a rehab facility in November, according to Baseball America correspondent Tom Haudricourt.

"It was kind of tough at first," Jeffress said. "You’ve just got to put your past behind you and move on, and learn from your mistakes.

"I was in (rehab) for about a month. It was very beneficial. I’d recommend that people go there if they need help for anything. Now, I’m concentrating on baseball, getting my life straight and keeping my nose clean."

Since the Brewers drafted him in the first round in 2006, Jeffress has tested positive on four drug tests for marijuana. The No. 4 prospect in the Brewers’ system, Jeffress has a plus-plus fastball that makes him one of the hardest-throwing pitchers in the minors. Jeffress, 20, had a 3.13 ERA, 94 strikeouts and 44 walks in 86 1/3 innings last season with low Class A West Virginia.