According to Moose Skowron:

Maris hit his record-breaking 61 home runs that year, and Mantle added 54. Skowron produced a career-high 28 long balls, giving the trio an impressive total of 143. The secret to their success, according to Skowron, was a special liquid refreshment.

"We drank a lot of beer," Skowron said with a laugh. "I've never played on a greater team."

Funny that he should say that. I've always joked with my brother that the Babe had a performance enhancer ("what do you think Beer is?). heh.

Via Brian MacMillan.