Mark Ingram knows 40-yard dash times matter to NFL types. Run a few ticks faster, and the number sure looks better for teams thinking of plunking down millions on a new hire. But Alabama's Heisman Trophy-winning tailback isn't sure how much, or if, he improved his draft stock by clocking a better time before NFL scouts, executives and coaches Wednesday at Alabama's pro day. "I think it's important. But sometimes you have to turn on the tape," Ingram said, then holds his thumb and index finger a couple of inches apart. "The difference between 4.4 and 4.6 is like that. Read more: http://sports.espn.go.com/nfl/draft2011/news/story?id=6198954