WASHINGTON — Wilson Ramos' sore wrist caused enough caution for the Phillies to send him back to Philadelphia on Wednesday morning for an MRI and keep him out of the lineup for the second straight game.

Ramos returned to Nationals Park 90 minutes before the first pitch and manager Gabe Kapler said he would be available if needed. Kapler said Ramos injured his left wrist on Sunday night when he bent it awkwardly catching a ball. It is the same wrist he injured on Saturday when he was hit just below the mitt by a 95 mph sinker from Jake Arrieta. Ramos was evaluated immediately on Saturday and remained in the game.

Ramos has seven hits in his first 17 at-bats with the Phillies since arriving in a trade-deadline deal with Tampa Bay. A return to the disabled list — Ramos was nursing a hamstring injury when the Phillies acquired him — would be a blow to a team trying to hunt down a playoff spot.

"We want to monitor Ramos and how he's feeling and be prepared to read and react," Kapler said before Wednesday's game. "As of right now, he's good. As of right now, he's on the card. As of right now, he's available to play for us tonight."

Phillies add lefthander

The Phillies addressed their need for a lefthanded reliever Wednesday afternoon by acquiring Luis Avilan from the White Sox.

Avilan had a 3.86 ERA in 39 2/3 innings with Chicago. The 29-year-old held lefthanded batters to a .214 batting average, .562 OPS, and no homers in 77 at-bats. Since May 21, he has limited lefthanders to a .136 average and no extra-base hits.

"He's really good vs. left and, as you know [against] Washington and Atlanta, it's nice to have the left-handed weapon," Kapler said. "It's going to be a nice weapon for us to have and this was a really, really smart acquisition by Matt Klentak and puts us in a much better position going forward."

The Phillies have had just one lefthander, Adam Morgan, in their bullpen with Austin Davis (lower back tightness) and Aaron Loup (left forearm strain) on the disabled list. Davis will be able to rejoin the Phillies when he is eligible to be activated on Sunday but Loup will require more time. Kapler said Loup was told to not throw for three weeks after suffering the injury on August 16.

The Phillies sent the White Sox 23-year-old righthander Felix Paulino, who had a 3.91 ERA in 31 games this season working both as a starter and reliever with high-A Clearwater and double-A Reading. Jose Taveras was designated for assignment to make room for Avilan on the 40-man roster. The 24-year-old returned to double-A Reading last week after missing most of the season with a strained right shoulder. The Phillies will have to make a roster move before adding Avilan to the 25-man roster on Thursday.

Extra bases

Justin Bour worked pregame in left field, but Kapler said it is a long shot for Bour to play there. He has only played first base. … Aaron Nola will face Max Scherzer Thursday afternoon in the series finale. The two pitchers lead all of baseball in WAR, according to Baseball Reference. Nola has a 8.3 mark while Scherzer has a 7.7.