Daytona 500 winner Trevor Bayne fit right in when he visited SanFrancisco last week, three days after his 20th birthday. The BayArea sports scene is dominated by athletes in their 20s. So let's rank them. How many? Twenty in their 20s, ofcourse. No disrespect to the thirtysomethings, such as the Giants' Aubrey Huff (34), theSharks' Joe Thornton (31) and the A's outfield trifecta of CocoCrisp (31), David DeJesus (31) and Josh Willingham (32).