From a Wall Street Journal story by Lindsey Adler headlined “The 75-Year-Old Pitching Guru Behind the Arizona Diamondbacks’ Success”:

Arizona Diamondbacks pitcher Merrill Kelly was surprised to receive an email from his retirement-age pitching coach Brent Strom at about 4:30 p.m. last Christmas Eve. Subject line: “Some thoughts…”

Kelly expected holiday greetings. He was wrong.

“I was thinking it would say, like, ‘Merry Christmas! Hope you’re enjoying it with your family,’” Kelly said. “It was the exact opposite of that. It was numbers and stats from the last year showing how I could improve going into the next season.”