He was leaning toward right-handed-hitting Jorge Cantu, but said he wanted to discuss it further with hitting coach Clint Hurdle and other coaches.
"My heart wants to put Cantu in there," Washington said. "I just have a feeling, but we'll talk about it."
Cantu started Game 1 against Rays left-hander David Price, going 0-for-4 with three strikeouts.
Cantu batted .232 (41-for-177) with two home runs and 15 RBIs against left-handed starters during the regular season.
Meanwhile, Washington definitely will start Bengie Molina behind the plate. Molina worked well with left-hander Cliff Lee in Game 1 and contributed three hits, including a home run, in the Rangers' 5-1 victory.