Kimbrel has thus far posted career-worsts in ERA (3.55), ERA+ (129) and FIP (2.87), and his highest WHIP (1.09), walk rate (4.1 BB/9), and lowest strikeout-to-walk ratio (3.33) since his 21-game debut in 2010, falling well short of the late-game dominance the Red Sox had anticipated when acquiring him in November.
Ziegler will wear No. 29 and will be active and available for Sunday's game.
The result has been a Boston bullpen that has been very ordinary, ranked 15th in the majors with a 3.92 ERA.
Red Sox President of Baseball Operations Dave Dombrowski will hope Ziegler can fortify the bullpen, which has been depleted in recent weeks with the pitching staff as a whole struggling. "The first time that he had been away from the Tigers after six full years in the big leagues there". Making his way onto the field for the national anthem before Friday night's game, Rodon stumbled on the dugout steps and sprained his left wrist while bracing his fall.
The 36-year-old has given up 41 hits and 15 walks while striking out 27 batters in 38 1/3 innings, not almost as dominant as last season when he posted a 1.85 ERA and allowed only 48 hits and 17 walks in 68 innings.
Aug 22, 2014; Boston, MA, USA; Boston Red Sox relief pitcher Koji Uehara (19) comes in to pitch during the ninth inning against the Seattle Mariners at Fenway Park.
This isn't something that's gone unnoticed all year with Porcello winning eight of nine starts at Fenway this year - getting the no-decision in the other game.
Red Sox: 1B Hanley Ramirez was out for his second straight day with a sore left shin.
Dustin Pedroia added a two-run single for Boston, which looks for a sweep of the three-game series Sunday when former Rays ace David Price is scheduled to pitch. Koji would give up a ringing single to Evan Longoria to start the frame, and only avoided letting the tying run come to the plate when he was gifted a strikeout call on a 3-2 pitch to Steve Souza that was clearly outside. "Luckily I was able to do something to help the team out".
The freefall of the Tampa Bay Rays continued Saturday afternoon with a 4-1 loss to the Boston Red Sox.
Ziegler, who owns Arizona's club record of 43 consecutive saves, is scheduled to be a free agent at the end of the season.
The Red Sox acquired Ziegler from Arizona early Saturday morning in exchange for infielder Luis Alejandro Basabe and pitcher Jose Almonte. "He's going through some treatment", Red Sox manager John Farrell said. He responded by posting a 1.85 ERA last season.
Manager John Farrell said Saturday the right-hander was injured shagging fly balls before Friday's win over Tampa Bay.
WHITE SOX: A freaky dugout injury landed LHP Carlos Rodon on the 15-day disabled list. O'Sullivan is 2-0 with a 6.75 ERA in five games (four starts) with Boston this season.
Farrell said it was part of Kimbrel's cardiovascular work.