A look at what's happening all around the majors today:

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SLUMPING SHIELDS

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Right-hander James Shields (2-9, 6.28) looks to end a terrible stretch for the White Sox. In three starts since being acquired from San Diego, Shields has given up 21 runs over 8 2/3 innings. He's also the majors' first pitcher since 2012 to allow six runs or more in four straight starts. Righty Rick Porcello (8-2, 3.76) looks to improve his Fenway Park record to 7-0 this season for the Red Sox.

ROAD WARRIOR

Diamondbacks right-hander Zack Greinke (10-3, 3.54) will face Rockies righty Eddie Butler (2-4, 6.26) as Arizona begins a four-game series at Colorado. In six road starts this season, Greinke is 5-0 with a 1.47 ERA, and is 7-4 lifetime with a 4.06 ERA against the Rockies.

BRAVE REMATCH

Mets right-hander Matt Harvey (4-9, 4.76) takes the mound in the opener of a four-game set against Atlanta. Righty Matt Wisler (3-7, 4.23) pitches for the last-place Braves, who beat Harvey and swept three games at Citi Field last weekend.

TIMMY'S TIME

Tim Lincecum (1-0, 1.50) makes his second start since his return to the majors following hip surgery last year. The longtime Giant made his Angels debut last weekend, limiting Oakland to a run on four hits over six innings in a 7-1 victory. He faces the Athletics again, this time facing off against Kendall Graveman (2-6, 4.87).

BIG CAT

Steven Moya, Detroit's 6-foot-6 slugging outfield prospect, tries to build off a two-homer game Wednesday night that tripled his career homer total in a series finale against Seattle. The powerful 24-year-old has hit 113 homers in 656 minor league games but went homerless in his first 31 games with Detroit before homering Sunday. The Tigers (37-35) are 4 1/2 games behind Cleveland in the AL Central.