As the baseball world mourns the loss of Tony Gwynn, it's important to remember all that the San Diego Padres legend did to impact Major League Baseball.
Using video to prepare for games is common in sports in today's age, but before Gwynn, it wasn't very common in baseball.
During a slump early in his career, Gwynn asked his wife to record his at-bats so he could watch them later. The original idea was to identify his mistakes, but he also started to study opposing pitchers. The Hall of Famer broke out of the slump after watching the videos but continued to watch the tapes to learn.
Back in 1989, Gwynn talked about how the use of video analysis helped him.
The rest is history.