MASN profiled Cavalli heading into the spring.
https://fb.watch/xTfZAcL0iC/WP too noting Doolittle's work with him:
https://wapo.st/4bbF42rDuring his rehab process, Cavalli worked to use his legs more in his delivery and take pressure off his arm. Sean Doolittle, Washington’s pitching strategist, noticed improvement during Cavalli’s final bullpen session at Nationals Park last season. And Doolittle — in collaboration with pitching coach Jim Hickey and the training staff — sent Cavalli a PowerPoint presentation, seeking to help Cavalli understand what the Nationals hoped his lower half could look like.
Doolittle called Cavalli an “exceptional athlete.” Cavalli played shortstop early in his baseball career, and Washington wanted him to replicate movements he made as a position player on the mound. The Nationals also gave him drills to improve his delivery.
“It’s not that he moved poorly before, but [we are] trying to give him an understanding of what roles the different body parts and the different movement patterns play in the throw so that he can just be a little bit more efficient,” Doolittle said. “When you got a guy that can generate that much force and get into such extreme range of motions, those guys, unfortunately, are vulnerable to injury.”
And he paints now (seriously)
Based on this, and that he's only throwing fastballs at the moment, it wouldn't be surprising to see him start the season on the 60 day IL and stay at West Palm for extended ST before going out on a rehab assignment.
