A look at what's happening all around the majors Wednesday:
Dodgers ace Clayton Kershaw is returning to Los Angeles for tests on a sore lower back that's been bothering him for weeks. Kershaw may still make his next scheduled start Friday night against Colorado despite dealing on and off with the discomfort. Kershaw has been on the disabled list only once in his nine-year career, in early 2014 with a shoulder strain. ''It's been a few weeks where it's been in and out, and he's so good, it kind of started barking a little bit, so I think that right now we just want to kind of get some answers,'' manager Dave Roberts said.
PITCHING THROUGH PAIN
Steven Matz had his scheduled start pushed to Thursday to get extra rest after being diagnosed with a bone spur in his pitching elbow. The young Mets lefty will continue pitching through the bone spur because doctors have assured the team he cannot do damage to it. ''He's going to have to deal with it because it's not going away,'' manager Terry Collins said Tuesday. Matz had Tommy John surgery on his left elbow in 2009 shortly after being drafted.
ROLLING IN ST. LOUIS
Cardinals right-hander Carlos Martinez (7-5, 3.02) tries to keep up a dominant stretch when St. Louis hosts Kansas City. Martinez is 3-0 with a 1.24 ERA over his past five starts, though he most recently got a no decision after seven strong innings in a 4-3 loss to Seattle. The Royals counter with Edinson Volquez (7-7, 5.15).
Right-hander Brock Stewart makes his major league debut for the Dodgers against Milwaukee after opening this season with Class A Rancho Cucamonga. The 2014 sixth-round pick rocketed to the majors with a 1.47 ERA in 14 starts between Class A, Double-A and Triple-A this season. Stewart was an infielder at Illinois State who rarely pitched before being drafted, but he needed just 221 1/3 minor league innings before getting the call. His quick transition to the mound may have been helped by the fact that his dad, Jeff, is a scout with the Rays.
Danny Salazar (9-3, 2.40) takes a five-game winning streak into Cleveland's game at Atlanta. The 26-year-old has been dominant, but not necessarily efficient. Entering Tuesday, he was second in the AL in ERA behind Boston's Steven Wright, but he had also thrown the second-most pitches per plate appearance in the league with 4.17. Salazar also ranked third in the majors with an average run support of 6.29.