Sunday Notes: Cubs Rookie Ethan Roberts Cuts and Sweeps His Spin
Prior to talking to him in Wrigley Field’s home clubhouse in late August, my knowledge of Ethan Roberts mostly consisted of his being a 27-year-old, right-handed reliever with limited big-league experience and a high spin rate. I also knew he’d had Tommy John surgery in 2022 as that was mentioned, along with his spin, when he was blurbed as an honorable mention on our 2023 Chicago Cubs Top Prospects list.
The 2018 fourth-round pick out of Tennessee Technological University has added to his résumé since we spoke and now has 27 appearances for his career, 18 of them this year. His numbers in the current campaign include a 2.66 ERA and 23 strikeouts over 23-and-two-thirds innings. Three days ago he tossed a scoreless frame against the Washington Nationals and was credited with his first big-league win.
Roberts learned that he spun the ball well upon entering pro ball. Not long thereafter, he learned that not all spin is created equal.
“It was my first time around technology,” explained Roberts. “I threw a bullpen and my fastball was spinning pretty high. It was spinning like 2,800 [RPMs] —right now it’s more 2,600-2,700 — and I actually throw it very supinated. It’s kind of like a natural cutter. But yeah, when I got on technology there, in Arizona [at the Cubs spring training complex], I was like, ‘I don’t know what any of this means, but thanks for telling me.’”
Which brings us to his spin characteristics, as well as to pitch classifications. Read the rest of this entry »