NFL draft prospects have plenty of motivation to go all out for the 40-yard draft.

The event is often the most scrutinized metric for a skill position prospect every year in Indianapolis. The difference between 4.4 and 4.6 can make or break a player’s draft stock.

Now, the difference between 4.23 and 4.25 can make a million-dollar difference.

Adidas announced on Tuesday that it’ll offer up a $1 million prize for any player who can break 4.24 seconds and set a new 40-yard dash record at the NFL Scouting Combine.

That mark was set by East Carolina running back Chris Johnson in 2008, and it hasn’t been touched in the seven combines since.

There are, however, some restrictions.

According to the official rules, the athlete must be wearing adidas shoes to be eligible. If there’s a tie, the money will be split among all eligible participants. If an athlete breaks the record on his first try then breaks it again on his second, he would still only win $1 million. If the player is ever disqualified by the NFL for any reason, he is not eligible.

It’s quite the step up from last year, which saw adidas hand out $100,000 apiece to its top three athletes in the 40-yard dash, one of whom was Michigan State defensive back Trae Waynes. He recorded a time of 4.31 seconds and was eventually selected 11th overall by the Minnesota Vikings.

Braxton Miller did come out and say that he wanted to run a 4.28 40-yard dash. Now, he and others will have one million reasons to hit 4.23.