"He was a guy that was 30/30 or 25/25. He was the best center fielder in the game at the time when I played with him, so seeing him back, hopefully he's healthy, and I think he'll be good," said Sabathia.
Sabathia wasn't stunned to see the many highlights Sizemore produced in Monday's nationally televised game against the Cardinals.
"It's just because he's such a good athlete, it's not really surprising to me," Sabathia said. "He was so much fun to watch when I played with him. He was young and full of so energy and would kind of take over the game. It was just fun to watch.
Sizemore will play a Minor League game on Wednesday and return to Boston's lineup on Thursday night against the Yankees.