In Case You Missed It: Mario’s 50 Block Sprint (Mario Mania Player’s Guide 1991)
(Published on August 22nd 2016)
This page shows how fast Mario could sprint in all of his different games. What’s interesting is that his slowest time, besides the frog suit, is from Super Mario Bros. 2. This more than likely is due to the fact that Super Mario 2 was originally a completely different game called Doki Doki Panic. In said game, the characters did not have the ability to sprint.