Warren is among several Angels relievers vying to make the Opening Day roster, Sam Blum of The Athletic reports.
The Angels have multiple bullpen arms competing for a few roster spots, and Warren figures to be among the leaders of that group. The right-hander helped his case with a strong spring, allowing just one run over 6.2 innings and posting a 5:3 K:BB. Warren logged 20.1 relief innings as a rookie last season, impressing with a 1.77 ERA, 1.03 WHIP and 20:5 K:BB.