Steve Drumwright

The Boston Red Sox feel Eduardo Rivera is ready for a big jump. A day after promoting the left-handed starter from Double-A Portland to Triple-A Worcester, the Red Sox called up Rivera on Wednesday to make his MLB debut. So Rivera is basically going straight from Double-A to the majors. Right-handed reliever Jack Anderson was optioned back to Triple-A. First baseman Triston Casas (ruptured left patellar tendon, abdominal strain) was transferred from the 15-day injured list to the 60-day IL to make room for Rivera on the 40-man roster. What role the 6-foot-7 Rivera will fill is another question as the rotation currently has a hole due to right-hander Sonny Gray going on the 15-day injured list Tuesday with a strained right hamstring. But the bullpen has also been overworked in recent days and left-hander Payton Tolle, Talk Sox's No. 1 prospect, is primed to be called up to fill Gray's spot. The 22-year-old Rivera had made two starts at Double-A Portland this year, pitching 10 innings with three walks and 16 strikeouts. In 2025, splitting time between High-A and Double-A, Rivera made 15 starts and five relief appearances, walking 46 and striking out 108 in 87 innings. Rivera pitched for Puerto Rico this spring in the World Baseball Classic. Anderson was called up April 14 to make his MLB debut and has pitched three times covering eight innings, which could be the role for Rivera. Anderson allowed one run in each of those outings, while giving up eight hits and two walks while striking out six. View full rumor

While awaiting word on the severity of the injury, the Boston Red Sox placed right-handed starter Sonny Gray on the 15-day injured list Tuesday with a strained right hamstring. Gray was injured in Monday's Patriots Day game against the Detroit Tigers, leaving in the third inning of an 8-6 victory. He was set to undergo imaging Tuesday to determine the extent of the injury. Left-handed reliever Tyler Samaniego was called up from Triple-A Worcester. This is Samaniego's second stint with the Red Sox this season. He came up April 8 and made his MLB debut that day against the Milwaukee Brewers, pitching a scoreless inning with three strikeouts and a walk. He pitched 3⅔ innings in three games, without allowing a run, walking three and striking out four. Gray, acquired in the offseason via trade from the St. Louis Cardinals as a rotation stabilizer, had a 4.30 ERA in five starts, walking five and striking out 13 in 23 innings. The Red Sox will need to find a replacement in the rotation for Gray, perhaps left-hander Payton Tolle. The Red Sox open a three-game series at Fenway Park today against the rival New York Yankees. View full rumor