The Week Ahead

SATURDAY 8/13

Gravity Games

Bikers, skateboarders and motocross riders descended on Pennsylvania last month. The only tricks skateboarder Bam Margera pulled were on the ramps of Philadelphia's FDR Skatepark. The MTV prankster made his return to competition after a four-year absence at the games. OLN 5 p.m.

All-American High School Baseball Classic

The battle of the top 2006 prospects will feature a pretty big unit: Dellin Betances (right), a 6'9" righthander from Brooklyn whose fastball has been clocked in the mid-90s. He'll pitch for the East team in the third annual game. Last year Justin Upton played shortstop for the East; in June he was taken No. 1 overall in the draft by the Diamondbacks. FSN 2 p.m.

PGA Championship

Last year Vijay Singh used the season's final major as a springboard. After winning his second PGA, Singh won four of his final eight tournaments and took over the top spot in the world rankings. He has since ceded it to Tiger Woods, who will be his top competition at Baltusrol in Springfield, N.J. "I'm playing better this year," warns Singh, who is trying to become the fifth man to win the PGA at least three times. (The final round is on Sunday.) CBS 2 p.m.

SUNDAY 8/14

AVP Huntington Beach Open

Midway through the Nissan Championship Series, Olympic gold medalists Misty May-Treanor and Kerri Walsh hold a narrow lead over Rachel Wacholder (left) and Elaine Youngs--the pair that broke their 50-match winning streak last month at the Cincinnati Open. NBC 4:30 p.m.