Recently, the Yankees asked second baseman Robinson Cano to hand over his No. 22 in the event of Roger Clemens signing with the club, The Post confirmed yesterday. Cano will switch to No. 24, and he's as eager as anyone to see the seven-time Cy Young Award winner in pinstripes again. Cano's number already has been officially adjusted on the team roster, according to a source. "I was happy to give up the number to a future Hall of Famer if Roger comes aboard," Cano said in a statement. "Hopefully, he will be one of my teammates, I'll have the pleasure of playing with him." "No decision will be made until well after spring training, perhaps until after the season starts," agent Randy Hendricks wrote in an e-mail yesterday.