Michael Charles Leach (born March 9, 1961) is an American college football coach. He is the head coach of the Washington State Cougars football team. Previously, he was head coach of the Texas Tech Red Raiders football team, leading the Red Raiders to winning seasons in every year of his tenure.

Based on that paragraph can we conclude that this sentence is true?
Leach had the most wins in Texas Tech history.
It's impossible to say