- Doug Padilla, Chicago White Sox beat reporter
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Parker was pitching to the White Sox’s Alejandro De Aza in the eighth inning when he winced in pain after firing a pitch.
Afterward, Parker said he felt something akin to a cramp one pitch before he was removed. He tried another pitch and the pain was more intense.
The injury isn't expected to be serious. He will be re-evaluated Sunday morning.
Cubs pitcher Parker had to leave his second outing with hamstring injury.