He has pitched in 383 regular-season major league games and 19 more in the postseason. So the last emotion you would expect to invade CC Sabathia’s large body while climbing a bullpen mound for the first time in spring training would be anxiousness.

Yet, that’s how the spine of the Yankees’ rotation felt yesterday morning at George M. Steinbrenner Field.

“I felt nervous, it was my first time going up [on the mound],’’ Sabathia said. “It immediately felt good.’’

In order to not rush Sabathia, who had a bone spur removed from his left elbow following the ALCS, he had not thown off a mound until yesterday. Andy Pettitte, Mariano Rivera and Phil Hughes threw for the second time in the bullpen.