The White Sox and starter Lucas Giolito did not reach an agreement on a contract before Tuesday's arbitration deadline.
The two sides will now go to an arbitration hearing to determine Giolito's 2022 salary figure. He filed at $7.5 million, and the Sox at $7.3 million, according to MLB.com's Mark Feinsand.
Tuesday was the deadline for teams and arbitration-eligible players to exchange salary figures for the 2022 season.
In recent offseasons, the deadline has landed in January, and if teams and players didn't reach an agreement by then, they would submit figures for a February hearing with a panel of arbitrators. The panel then chooses either the player or team's figure.
The Sox settled with right-hander Reynaldo López ($2.625 million) and outfielder Adam Engel ($2 million) Tuesday to avoid hearings.
Hearings will take place during the regular season this year due to MLB's 99-day lockout. However, Giolito and the Sox can continue negotiations and reach an agreement before the hearing.
Giolito, who's under club control through 2023, is an extension candidate with the Sox and has expressed openness to a long-term deal.
"I mean, I'm open to it," Giolito said after last season. "For me, I'm always interested in a long-term contract, something where, essentially: Make me a White Sox player for life.
"But the business of baseball is the business of baseball. A lot of that's out of my hands, so for the time being, I'm just going to focus on what I focus on, which is getting better, especially in the offseason right now.
"Getting my body strong, honing in and refining some of my pitching stuff and going out there and giving it my all for my team. That's all I can control. The other stuff, it is what it is."
The White Sox ace is coming off a strong season in which he finished with a 3.53 ERA in 31 starts, striking out 201 batters in 178 2/3 innings.
He finished 11th in AL Cy Young voting, after sixth- and seventh-place finishes in 2019 and '20.
López, who made $2.1 million in 2021, went 4-4 with a 3.43 ERA in 20 games (nine starts).
Engel made $1.375 million last season. In 39 games, he batted .252/.336/.496, missing time due to injury.
In all, 31 arbitration-eligible players across baseball exchanged figures for hearings on Tuesday.