At the small skill positions, maybe. Speed is definitely king there. But the strength used to hold a block or push through a block or tackle, are much longer than GCT in a sprint. And this doesn’t even touch on the development of body mass. Bigger, stronger and faster, not just faster,is what wins football games. Our high school (Coppell, TX) lost one game this year, late in the playoffs. We lost to the #1 team in the nation, Euless Trinity, by one point. They were not more skilled, we were. They were not quicker or faster, we were. They did not have a better game plan, we did. They beat us by pushing our butts down the field old school, overpowering our line and running over our linebackers. Size and strength matters, and you can definitely improve both in the weight room.