Graterol has added a new pitch to his repertoire for this season, though he hasn't yet disclosed the pitch type, Jorge Castillo of the Los Angeles Times reports.
Graterol's primary weapon is a sinker he often throws at triple-digit velocity, with a high-80s slider featuring as his secondary offering. The right-hander added a cutter to his pitch mix last season, and it appears that he'll now have a fourth option at his disposal. It's unlikely that Graterol will feature the new pitch prominently -- he relied on the sinker or slider over 90 percent of the time last season -- but the push to broaden his arsenal is at least a positive sign that the 23-year-old is intent on furthering his development after a somewhat disappointing 2021 campaign.