Even if he has not failed a drug test, Angels center fielder Gary Matthews Jr. could be suspended for up to 80 games for his alleged involvement in the purchase of human growth hormone. In addition to a 50-game penalty for a first positive test, baseball's drug policy mandates a suspension from 60 to 80 games following a first conviction for "possession or use of any prohibited substance." The clause is triggered when a player is convicted or pleads guilty or no contest. However, Matthews could receive immunity from prosecution in exchange for his testimony in a possible trial. "If he has immunity, he's out of the woods on that clause," said Brian Hennigan, a former federal prosecutor now with the Los Angeles law firm Irell & Manella.