What’s the deal with Reynaldo Lopez and mechanics?

TL;DR

Reynaldo Lopez's pitching mechanics have come under scrutiny after a series of inconsistent performances. Despite a strong start to the season, mechanical issues have led to a hiatus from the rotation and questions about his effectiveness.

Key points

Reynaldo Lopez's velocity dropped in Spring Training due to mechanics.
He had a strong debut but struggled in subsequent outings.
Lopez is currently on a pitching hiatus due to mechanical issues.

Reynaldo LopezAtlanta BravesLos Angeles AngelsJorge Soler

ANAHEIM, CALIFORNIA - APRIL 7: Reynaldo López #40 of the Atlanta Braves reacts after hitting Jorge Soler (12) of the Los Angeles Angels with a pitch at Angel Stadium of Anaheim on April 7, 2026 in Anaheim, California. (Photo by Jayne Kamin-Oncea/Getty Images) | Getty Images The Reynaldo Lopez mechanics saga is, well, a saga. First, we had his diminished velocity in Spring Training due to “mechanics” rather than injury or something else that persisted, as he was throwing in the high 90s in this 2026 debut. That debut went well without Lopez pitching all that well, but he looked and pitched much better in starts three and four, until essentially a career-worst outing in Washington upended the nascent trend of effectiveness and threw everything into question. Since then, Lopez has been on a rotation hiatus, but really, a pitching hiatus. He was warming up in the bullpen in Sunday’s win over the Phillies, but didn’t make it into the game. The explanation? It involves “mechanics” again. So, because I have no idea and am hoping someone else will do the work for me: what mechanical issues are we talking about, exactly? Mechanics have now been attributed to Lopez’ wide variance in fastball velocity from pitch to pitch and game to game, but also his overall effectiveness. I can’t tell whether it’s meant to be a vague catchall for everything under the sun, i.e., he’s not effective and we’re not sure why but he doesn’t want to go to on the Injured List, or whether there really is something that he’s unable to fix in a side session. Anyone have any ideas?

Q&A

What mechanical issues is Reynaldo Lopez facing?

Reynaldo Lopez's mechanical issues are linked to wide variances in his fastball velocity and overall effectiveness, raising concerns about his pitching performance.

Why has Reynaldo Lopez been on a pitching hiatus?

Lopez has been on a pitching hiatus due to ongoing mechanical issues that have affected his performance, leading to his absence from the rotation.

How did Reynaldo Lopez perform in his recent starts?

Lopez had a promising start to the season but experienced a career-worst outing in Washington, which raised questions about his pitching mechanics and effectiveness.