The blurb on the team’s official website said nothing about the speed of the fastball the former college pitcher threw. Via USA Today, there’s a minor discrepancy on that point.
The scoreboard at Safeco Field touted the pitch at traveling at 98 miles per hour. The Mariners’ broadcasters said that the ball was moving at only (only?) 75 mph.
Though the truth is likely closer to the lower number, there’s no doubt that Wilson can throw both a football and a baseball effectively.