Colorado Rockies closer Greg Holland will not exercise his $15 million player option and instead become a free agent.

Holland will be able to earn a big multiyear deal after his very nice comeback season in Colorado. But it will be interesting to see just how big.

Word is, with the new emphasis on the bullpen, agent Scott Boras believes it’s time for an explosion of salaries for bullpen stars.

Of course, the two biggest bullpen deals were made last year, with Aroldis Chapman getting $86 million from the New York Yankees and Kenley Jansen $80 million from the Los Angeles Dodgers. But it’s also about the emphasis being placed on the bullpen now, especially in the postseason.

A couple execs suggested they believed Mark Melancon’s $62 million, four-year deal could be a comp for Holland. But Boras doesn’t want to place limits on it.

It remains to be seen where Holland would fit into the closer hierarchy, but after a third 40-save year (he finished with 41), the 2018 player option isn’t a real option. Holland is said to love Colorado, and they love him, so it’s possible he could wind up back there, just not on a one-year deal

Boras points to Holland’s great seasons in Kansas City, his amazing start (before he tired late) and a especially an environment where relievers are being re-evaluated.