Betts' knee injury, which forced him to leave Friday night's game, has been developing since the All-Star break, according to Boston manager John Farrell, Bill Ballou of the Providence Journal reports.
Betts had been receiving occasional treatment on the knee before getting pulled from Friday night's game. He's listed as day-to-day and we should learn more Saturday.
Martinez entered Friday night's game to play right field when Mookie Betts (knee) was forced to leave. He had a single in two at-bats and made a pair of nice defensive plays.
Betts' injury came out of nowhere, but apparently it's been developing since the All-Star break, according to Bill Ballou of the Providence Journal. He's listed as day-to-day, so Martinez may get another start or two while the Red Sox investigate Betts' knee.
Estrada (5-4) gave up two earned runs on seven hits and a walk over six innings in Friday's 2-1 loss to the Mariners. He struck out three.
The veteran right-hander made a solid return from his back injury, giving up only a first-inning fielders choice RBI to Robinson Cano and a fifth-inning run-scoring double to Seth Smith. Estrada was also able to notch 14 swinging strikes, but didn't receive any appreciable run support on a night where Mariners lefty James Paxton consistently stymied the potent Blue Jays lineup. Despite dropping his second straight decision, Estrada's ERA remains a solid 2.94 and his WHIP remains a strong 1.01.
Cishek notched his 23rd save by striking out the side in the ninth inning in Friday's 2-1 victory over the Blue Jays. He also gave up a hit and a walk.
As he often does, Cishek managed to make things interesting before wiggling out of trouble. He threw 26 pitches in total, just two days after firing 38 in a two-inning stint versus the White Sox. The 30-year-old now has three straight scoreless outings, and has lowered his ERA from 3.15 to 2.86 over that span.
Paxton (3-4) struck out nine Blue Jays while giving up just one earned run on three hits and a walk over seven innings in Friday's 2-1 victory over Toronto.
The 27-year-old southpaw was outstanding in one of the best hitting environments in the majors. He induced a whopping 19 swining strikes, equaled the second-lowest amount of earned runs he's surrendered in a start this season and posted his second-best strikeout total as well. Paxton has had an up-and-down campaign, but has now emerged victorious in two of his three July decisions.