The Mets are considering using Sproat as a multi-inning reliever in 2026, Will Sammon of The Athletic reports.

The Mets still view Sproat as a starting pitcher over the long haul, but there's currently not room for him in the major-league rotation and the club believes he can help in the bullpen. Sproat made four starts for the Mets in September, finishing with a 4.79 ERA and 17:7 K:BB over 20.2 innings. The 25-year-old posted a 4.24 ERA and 113:53 K:BB across 121 frames in 2025 with Triple-A Syracuse.

The Diamondbacks signed Campbell to a minor-league contract Dec. 5.

In parts of three seasons in the majors, Campbell has collected a 5.65 ERA and 42:16 K:BB over 43 innings. The 28-year-old reliever will give the Diamondbacks some experienced bullpen depth at Triple-A Reno in 2026.

The Phillies signed Garcia to a one-year, $10 million contract Monday, Francys Romero of BeisbolFR.com reports.

The Phillies are expected to trade or release Nick Castellanos this offseason, and Garcia is now lined up to replace him in right field. Garcia has just a .675 OPS and 89 wRC+ over the last two seasons, though he graded out as a solid defender in right field in 2025. He should benefit from a ballpark and lineup upgrade in 2026 in what will be his age-33 season.

Brewers GM Matt Arnold said Sunday that the organization is open to utilizing Zerpa as a starting pitcher, Adam McCalvy of MLB.com reports.

The left-hander was acquired from the Royals in exchange for Isaac Collins and Nick Mears, and the Brewers apparently view Zerpa as more than a relief option. The 26-year-old came up through the minors as a starter but operated as a reliever the past two years for the Royals, making all but two of his 129 regular-season appearances out of the bullpen. Even if he sticks as a starter and is fully stretched out to begin the season, Zerpa could have a short leash given his limited workload the last few years.

Kelly agreed to a two-year, $40 million contract with the Diamondbacks on Sunday, Ken Rosenthal of The Athletic reports.

The 37-year-old right-hander was dealt by the Diamondbacks to the Rangers at the trade deadline in July, and he'll now return to the desert for an eighth season. Kelly should step back in as Arizona's ace after posting a 3.52 ERA, 1.11 WHIP and 167:48 K:BB across 184 innings last season.

The Royals traded Zerpa to the Brewers on Saturday in exchange for Isaac Collins and Nick Mears, Jeff Passan of ESPN.com reports.

Zerpa finished the 2025 season with a 4.18 ERA and 1.38 WHIP across 64.2 innings while also recording 14 holds. The Brewers aren't hurting for high-leverage arms with Trevor Megill, Abner Uribe and Jared Koenig already making up the back end of their bullpen, so Zerpa will likely start out in a middle-relief role with his new club.

May signed a one-year contract with the Cardinals on Saturday that includes a mutual option for 2027, Jeff Passan of ESPN.com reports.

May set a new career high with 132.1 innings pitched between the Dodgers and Red Sox in 2025, though his 4.96 ERA and 1.42 WHIP in the regular season both marked significant regression from previous years. Despite his recent struggles, the 28-year-old righty should have little trouble claiming a spot in a Cardinals rotation that doesn't feature much depth following the departure of Sonny Gray.

Frasso (undisclosed) signed a minor-league contract with the Dodgers on Saturday, Aram Leighton of JustBaseball.com reports.

After turning in a 5.49 ERA and 1.58 WHIP over 77 innings at Triple-A Oklahoma City this past season and being non-tendered by the Dodgers in November, Frasso will officially return to the organization for 2026. The 27-year-old is still waiting on his first promotion to the majors, but he will likely need to show significant improvement in the minors before getting called up for his MLB debut.

Polanco signed a two-year, $40 million contract with the Mets on Saturday, Will Sammon of The Athletic reports.

After posting a career-worst .651 OPS in 2024, Polanco rebounded to the tune of a .265/.326/.495 slash line while logging 26 homers, 78 RBI and 64 runs scored over 524 regular-season plate appearances in 2025. He'll now help bolster the Mets' offense, though he's unlikely to continue playing at the keystone, considering the team traded for Marcus Semien in November. New York may instead utilize Polanco mainly as a DH or shift him to first base to make up for the loss of Pete Alonso.

The Nationals and Gray (elbow) avoided arbitration by agreeing to a one-year, $1.35 million contract Friday, Andrew Golden of The Washington Post reports.

Gray was limited to three rehab starts this season as he returned from UCL surgery and will receive the same salary he got in 2025. The right-hander is expected to be ready to go at the start of spring training, though he will likely face workload restrictions in 2026 after throwing a combined 35 innings over the previous two seasons.