Niese left in the first inning of a game Tuesday night against the St. Louis Cardinals with left knee pain. Manager Terry Collins expressed concern before the game about the lefty's knee. The team said Niese didn't experience pain warming up, but it flared during the game.
Analysis: Niese faced just four batters before being lifted for Robert Gsellman. Niese walked two and allowed an RBI single to Brandon Moss.
The Marlins have placed Dietrich on the 15-day disabled list with a right knee contusion. The move is retroactive to Aug. 19.
Analysis: Dietrich was at times a decent fill-in for injured first baseman Justin Bour, who was transferred to the 60-day DL Tuesday to clear a roster spot for outfielder Oswaldo Arcia on a waiver claim. He was hitting just .188 with no homers and three RBIs in 31 games since July 9, though.
Pineda's season-long inconsistency continued in Monday's start at Seattle, where the former Mariner surrendered five runs in 5 1/3 innings while not receiving a decision.
Analysis: Pineda had put together two straight solid starts heading into the game, including a stint of five scoreless innings against a potent Toronto lineup last Tuesday. The towering right-hander resumes his frustrating season with a home start against Baltimore on Sunday.
Castro recorded his first two-homer game as a Yankee with a pair of solo blasts in Monday's loss at Seattle.
Analysis: Five of Castro's career-high 17 homers have come in his last 10 games and he's 6 for 12 over his past three. The former Cub's .298 on-base percentage for the season has been a bit disappointing, though.
Sanchez hit two more homers and finished 3 for 4 with three RBIs in Monday's loss at Seattle.
Analysis: The promising 23-year-old is now 15 for 29 (.517) with seven homers and 11 RBIs over an eight-game tear and was named the AL's Player of the Week earlier Monday. "It's been unbelievable what he's done, the way he's swung the bat, the way he's played defense, the job he's done," Yankees manager Joe Girardi said.
Cruz contributed his 32nd home run in the eighth inning to give the Mariners some insurance in Monday's key 7-5 win over the Yankees.
Analysis: The 36-year-old is showing no signs of a slowdown as Seattle enters the stretch run. Cruz has homered in five of his last 12 games and is hitting .370 over his past 14 for the surging Mariners.
Seager clubbed a three-run homer and added a double while scoring twice in Monday's win over the Yankees.
Analysis: On pace for his first 100-RBI campaign, Seager has knocked in 16 runs in his last 14 games and is hitting .367 over his past 16. He's one homer shy of a third straight season with 25 or more.
Zunino delivered the big blow in Seattle's 7-5 win over the Yankees on Monday, a three-run homer in the sixth inning that erased a 5-3 deficit.
Analysis: Zunino has now homered in three straight games and knocked in eight runs during that power surge, part of a noticeable overall improvement at the plate for the former first-round pick. After batting an anemic .174 in 112 games last season, he's 8 for 23 (.348) over a six-game hitting streak and owns a .280 average with nine homers in 75 at-bats thus far in 2016.
Triggs matched a career high with six strikeouts and yielded just three hits over six scoreless innings in Monday's start against Cleveland.
Analysis: The rookie wound up with a no-decision while being victimized by a lack of offense once more. Triggs has allowed only four runs and held opposing hitters to a .179 average in three starts since being inserted in the rotation, but he's 0-1 and received a paltry one run of support over that span.
Carrasco held the A's to four hits and struck out nine over eight dominant innings, and was rewarded with a win Monday when Carlos Santana broke a scoreless tie with a solo homer in the top of the eighth.
Analysis: Carrasco continues to pile up the strikeouts, having notched 11 in his previous start and 37 over his last four. The right-hander is 2-1 with a 3.14 ERA during that stretch, but faces a tough assignment in his next scheduled outing Saturday at Texas.
Lester improved to 14-4 on Monday, giving up a run and five hits in six innings with two walks and eight strikeouts to beat the Padres.
Analysis: The Cubs have won all seven of Lester's starts since the All-Star break as he's gone 5-0 with a 2.28 ERA, striking out 46 in 43 1/3 innings. He next pitches Sunday at Dodger Stadium. His only complete game of the season was a four-hitter against the Dodgers on June 1.
Rizzo tied a career high with four hits in Monday's win in San Diego.
Analysis: It was the fifth consecutive multihit game for Rizzo, and he's scored a run in all of them. Strangely, though, he's homered only once in his last 30 games despite ranking among the NL leaders with 25.