The 25-year-old right-hander sustained the injury when Marlins first baseman Logan Morrison hit a line drive back to the mound in the ninth inning. Although he was able to recover and get the ball to first for the second out, Walden said the throw was a light two-fingered toss to help lessen the pain in his throwing hand. He was replaced by Anthony Varvaro before the next batter, but was saddled with his second loss of the season.
While Walden has excelled in eighth-inning relief appearances, compiling a 2.31 ERA with 29 strikeouts in 23 1/3 innings of work this season, his ERA is a more pedestrian 4.50 in 10 appearances from the ninth inning onward. He endured an up-and-down pair of ninth-inning outings during the team's 14-game winning streak -- allowing the game-tying run on July 29 against the Rockies for his first blown save of the year before shutting down the Nationals in the ninth on Aug. 5 for his first save this season.
Eric Single is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.