Must go faster.

No, it wasn't a tyrannosaurus rex chasing the D-backs' Geraldo Perdomo on the basepaths, it was his teammate Corbin Carroll, one of the speediest players in all of MLB (he would be the speediest if not for Bobby Witt Jr. of the Royals).

What happened was this: Perdomo had led off the ninth inning of Friday's 9-1 D-backs win at Coors Field with a single, and advanced to second when Carroll also singled. Up next was Josh Rojas, who launched a long fly ball out to center field. Colorado's Brenton Doyle looked like he might have a shot to catch the ball, so Perdomo stayed on second base in case he needed to tag up. Carroll, who possibly was more confident than Perdomo that Doyle wasn't going to make the catch, had strayed far off first base and was mere feet from second.

Once the ball fell in for a hit, they were both off and running for home, with Carroll hot on Perdomo's heels until they both touched home plate within a second of each other.

"I saw him running around the bases. I thought he eventually would have caught him for sure," D-backs manager Torey Lovullo said. "He's one of the fastest human beings I've ever been around."

Now for some numbers, courtesy of MLB.com's Sarah Langs: Carroll’s first-to-home time: 12.64 seconds; Perdomo’s second-to-home time: 12.38. And it wasn't even like Perdomo was moving at a slow pace! Per Langs, Carroll's sprint speed on the play was 30.0 feet per second, which is elite, while Perdomo's was 27.8, which is still above average -- both compared to the rest of MLB (27 ft/sec) and his overall numbers this season (27.1).

There's fast. And then there's Corbin Carroll fast.