Lucas Giolito was the last remaining top free agent on the board until the San Diego Padres signed him. That was primarily due to injury concerns surrounding the 31-year-old pitcher. The Friars ended up swooping in and signing him to a ridiculously low one-year, $3 million contract.
Lucas Giolito’s Surprisingly Successful Debut
It’s certainly early, but it looks like a bargain. Giolito made his debut on Sunday for the Padres, pitching five-plus innings of one-hit ball. The final line looked rougher than it should have. The outing gave Giolito a 5.40 ERA, but that doesn’t tell the whole story.
The righty managed to limit hard contact for his entire outing, and likely could have pitched deeper, but his command wavered in the sixth. He issued three consecutive walks before the Friars turned the game over to the bullpen. Reliever Yuki Matsui walked Josh Naylor to walk in a run, then gave up back-to-back sacrifice flys, allowing all of Giolito’s baserunners to score.
But those runs were inconsequential in the Padres’ 8-3 win over the Seattle Mariners. Giolito earned the win in his first game with the Friars. It was a solid enough performance to ensure a rotation spot for the foreseeable future. But his production on the mound was good enough to leave San Diego wanting even more from the right-hander.
What’s Under the Hood?
Giolito’s expected metrics are even better than his actual ones. His 5.40 ERA is supplanted by a much better 2.39 xERA. Even though his fastball velocity is down (93.3 mph in 2025 to 90.4 mph in 2026), the pitch was still just as valuable in his debut, if not more. Giolito’s four-seamer had a whiff rate and put-away rate of 25.0 percent. He also had a barrel rate of 0.0 percent in 13 batted balls allowed.
Giolito has a roughly 50/50 split between ground balls and air balls, though he puts more in the air (53.8 percent). However, of those in the air, the vast majority are harmless pop-ups (23.1 percent), with line drives (15.4 percent) and fly balls (15.4 percent) being a minority. That production will likely even out more as Giolito’s season progresses, but it’s an encouraging sign from the right-hander.
The quality of contact is the most encouraging sign. Before 2026, Giolito had always been good at limiting solid contact, but his injuries had ticked up the barrel rate significantly (11.0 percent in 2023, 9.0 percent in 2025). With his 0.0 percent barrel rate thus far, the solid contact rate has gone down as well (7.7 percent in 2025 to 6.0 percent in 2026). That performance may not continue. Statcast projects Giolito’s xBA at .126, whereas his actual opponent batting average is .063, but it’s possible that he finds something special in San Diego.
The Padres’ Rotation Picture
The Friars have struggled to piece together a starting rotation marred by injuries. With Yu Darvish and Joe Musgrove out before the season started, and Nick Pivetta gone for the next few months, San Diego has relied on Michael King and the emergence of Randy Vásquez. Those two have been wonderful, but the back-end has been rougher. Walker Buehler and Griffin Canning have not pitched their best, to be sure, but they’ve been mostly serviceable.
Giolito took knuckleballer Matt Waldron’s place in the rotation. Waldron had been somewhat solid in his last few outings, but not enough to keep his rotation spot over Buehler or Canning. Giolito has proven himself to be a signing of immense value so far. If he continues to produce in this way, the Padres may have signed the best under-the-radar pitcher of the season.
Main Photo Credit: Steven Bisig-Imagn Images
