This was opening day of sorts for Andy Pettitte, complete with appropriate 42-degree temperatures and a sharp wind gusting across Field 2 on Sunday morning.

Pettitte tossed his first two simulated innings of spring training against live hitters, sandwiching Mariano Rivera's one-inning session – a sleepy event that nonetheless grabbed Derek Jeter's attention.

"I almost tried to jump in there and play," the Yankees captain said with a wink. "Got here too late."

Earlier, on another field, Phil Hughes made 25 tosses from flat ground – his first on-field work since a bulging disk in his upper back put him about two weeks behind the other starters.

Hughes, Pettitte, Rivera and ace CC Sabathia have yet to appear in a Grapefruit League game, though Sunday represented a morning of slow progress.

"Obviously, nothing can simulate a real game, but mentally I feel like I can get in a pretty good place," Pettitte said after throwing 35 pitches to the right-handed hitting Matt Diaz and minor-league lefty Francisco Arcia. "So, it's good for me to gradually get into it."

Rivera pitched to the same hitters Sunday for his second simulated inning of spring, and was asked if he felt ready to graduate to an exhibition game.