The 26-year-old High School Musical star proudly hung his blue AA sobriety chip around his neck -- which implies he's been clean and sober for six months -- while cheering for the Los Angeles team.
Efron secretly completed a rehab stint in April 2013. After leaving the treatment facility the former child actor has been keeping busy working on his forthcoming film That Awkward Moment -- in theaters January -- and recovering from a broken jaw he sustained after falling in his house in November.
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