BOSTON -- The Red Sox achieved a goal of adding some depth to their rotation on Thursday, signing left-hander Martin Pérez to a one-year contract with a club option for 2021.

The deal is for $6 million, a source told MLB.com's Mark Feinsand, and the option is for $6.25 million, according to MLB Network insider Ken Rosenthal.

The move to add Perez came a week after Rick Porcello agreed to a one-year contract with the Mets. Boston has also discussed trading left-hander David Price with a handful of teams, which could potentially open up another spot on the starting staff.

Perez, who will turn 29 in April, went 10-7 with a 5.12 ERA over 32 outings (29 starts) with the Twins in 2019. That came after the southpaw recorded a 6.22 ERA across 22 appearances (15 starts) with the Rangers in '18.

As it stands now, Perez would join an already lefty-heavy rotation that includes fellow southpaws Price, Chris Sale and Eduardo Rodriguez, along with right-hander Nathan Eovaldi.

It's unclear whether the Sox will use Perez as a starter or a swingman. Boston has also mentioned the possibility of using an opener, so Perez could factor into that as well.

Perez produced double-digit wins three times for Texas, where Perez had spent his entire career until signing with the Twins as a free agent last January.

In 173 career appearances, including 157 starts, Perez is 53-56 with a 4.72 ERA.