Tigers Make Sudden Coaching Change Amid Growing Baserunning Scrutiny

A shift in strategy leads to a new direction for the Detroit Tigers as Billy Boyer steps in to replace Joey Cora as third base coach.

The Tigers made a coaching change before Tuesday night’s game against the Athletics, with manager A.J. Hinch announcing that third base coach Joey Cora has left the organization.

Hinch said he and Cora met and “mutually decided to part ways” because of philosophical differences that had come up. He described those differences as strictly baseball-related. Billy Boyer will step in as third base coach right away.

Cora had been in that role for two and a half seasons after joining the organization in November of 2023, and he also served as the Tigers’ infield instructor during that span. The 61-year-old spent 11 seasons in the majors, mostly with the Padres, White Sox, and Mariners, before moving into coaching.

The move raises the possibility that the split had more to do with how Cora worked with players than with his decisions at third base. Like most third base coaches, he took heat for a few aggressive sends that went wrong, but the Tigers have generally been solid on the bases under his watch, even without stealing many bags. That has slipped some this season, though, with Detroit ranking 17th in team baserunning per FanGraphs after finishing 10th in 2025.

Boyer, 41, came up through coaching after working as a college coach and then spending 2019 and 2020 in the Twins’ player development system. He joined the Tigers in 2021 as a minor league infield coordinator, part of the overhaul of the organization’s player development system under now assistant general manager Ryan Garko after Dave Littlefield was reassigned. This season, Boyer has been the major league club’s quality control coach.

Given his background and the fact that he has been working with infielders all year, Boyer is expected to take over Cora’s infield responsibilities as well.

The Tigers will have a new voice and a new set of signals at third base, but the bigger picture may not change much. Detroit remains committed to being aggressive when sending runners from third to home, and now the question is whether Boyer will be more or less successful making those calls.

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