The details of the contract are “not known.”
Diekman, 35, pitched a 3.86 ERA in 2021, posting a 4.46 FIP to go along with a 1.35 WHIP. The eight-year veteran has pitched for a number of teams, though spending his previous three seasons with the Athletics.
This is Boston’s second move of the day, after the team reportedly signed fellow southpaw Matt Strahm to a one-year deal.
“The last time (chief baseball officer) Chaim (Bloom) talked to you guys, he talked about trying to get a right-handed bat and some bullpen help,” Red Sox manager Alex Cora said at the JetBlue Park complex earlier Sunday, according to MassLive. “It’s been relentless the last two days. That’s why I took a flight from Puerto Rico at 6 in the morning. So I could be here. And on the way here and alligator alley, just make phone calls not only to Peter Gammons but to other people.
“We all know what we need,” Cora continued. “I think the whole industry knows where we’re at. We’re just trying to get better. We’ve got some interesting guys that are here, non-roster invitees that provide us depth in the infield. And we’ve got some interesting guys, too, that can play multiple positions. And we like versatility. But we’re still working. The whole group up there (front office), they’ve been working for the last two days and we know we can improve in the upcoming days.”