Vladimir Guerrero Jr. has reunited with Junior Rodriguez, the Dominican trainer who guided him before his 2021 breakout. He's sharing their sessions on Instagram.

Guerrero first reached out to Rodriguez in late September 2020. The main goal that winter was weight loss.

The program also covered strength, power, flexibility and conditioning. Sessions ran 90 minutes, four times a week, at his home gym.

Rodriguez also identified a key issue. He said limited range of motion in Guerrero's torso had been sapping his power.

The results were spectacular. In 2021, Guerrero hit .311 with 48 homers and a 1.002 OPS.

Can lightning strike twice? He needs it to.

Vladimir Guerrero Jr.'s comeback plan now has a familiar face

His 2026 was the worst of his career. He hit .260 with nine homers over 144 games.

Rodriguez joins a growing support team. Guerrero had laser eye surgery after the season, and his father, Hall of Famer Vladimir Guerrero Sr., and uncle Wilton are helping with his swing.

There's precedent for this kind of rebound. Paul Goldschmidt hit .260 in 2019, then bounced back to .304 in 2020 and 31 homers in 2021.

The slugger will get an early test, too. He's scheduled for a home run derby on Sunday, Dec. 13, at Estadio Américo Hernández in Azua.

Bringing back Rodriguez is the smartest piece of the plan. The eye surgery and his dad's advice help, but the torso mobility fix is what unlocked his best season, and it might again.

It's like calling the mechanic who fixed your car the first time. You don't experiment when you already know who has the right tools.

The stakes are enormous. He enters the second season of a 14-year, $500 million contract that runs through 2039.

The Azua derby won't prove anything on its own. But if the power shows up in December, Toronto might finally exhale before spring.