The Chad Pennington era is over, The New York Post learned Monday morning. The scores of booing Jets fans and angry radio talk show callers will get their way next Sunday when the Jets play the Redskins at Giants Stadium. On the heels of Sunday's lackluster 13-3 home loss to the Bills, Kellen Clemens, who replaced Pennington with 3:32 remaining in the game, will become the starter this week and almost surely remain so for the rest of the season. Eric Mangini has little choice but to go to his backup quarterback - and probably a number of other backup players - after his Jets fell to 1-7 with an offense that too often looked hopeless.