In short, with an American League-worst ERA, the bullpen hasn't been kind to Haren. The Angels hope David Pauley can help.
With the bullpen struggling, Pauley got the call up to the Majors from Triple-A Salt Lake to replace reliever LaTroy Hawkins, who was placed on the 15-day disabled list Monday with a broken right pinkie finger.
The 28-year-old reliever signed a Minor League contract with the Angels in the offseason after getting released by Detroit in Spring Training. Pauley was drafted by the Padres in the eighth round of the 2001 First-Year Player Draft and has been with the Red Sox, Orioles, Mariners and Tigers.
"The thing that appealed to me here was it was a good situation," Pauley said. "There were a good group of guys here and there was an opportunity to come and play. And that's all I really wanted was an opportunity to be seen again and get back to what I was. It just felt like the best fit."
Haren last faced the Twins on April 12, when he fired five innings, yielding three runs on nine hits, and struck out seven. He took a no-decision, but the Angels lost, 10-9.
Like the Angels starter, the Twins' starting rotation has struggled to get wins -- albeit for completely different reasons. Minnesota's starting rotation has allowed the most runs (115) and the most home runs (30). Therefore, they have the least wins (4) and most losses (16) in the Majors.
Manager Ron Gardenhire also looked to the farm system for help.
Liam Hendriks was scheduled to start opposite of Haren, but he was optioned to Triple-A Rochester after posting a 9.00 ERA in four starts. Left-hander Scott Diamond got the call to replace him. Diamond was 1-5 with a 5.09 ERA last season, but he showed promise with a 2.60 ERA in six starts for the Red Wings.
And Minnesota could certainly use his help.
"I'm not looking at it that way," Diamond said. "I'm looking at it like we're in just a little bit of a funk. And we're going to break out sometime. Hopefully, I can help break that mold."
Angels: Getting back on track
The Angels have won seven of their last 10 contests since losing five straight.
Angels starters have posted a 1.84 ERA -- 53 2/3 innings, 11 earned runs -- over their last seven games.
Twins: Pitching woes
The Twins' starting rotation also owns the highest ERA (6.73), highest opponents batting average (.322) and fewest strikeouts (74) in the Majors.
The Twins have been outscored 94-33 in the first four innings of games this season.
Joe Mauer is 9-for-24 (.375) with a double, a home run and six RBIs against Haren in his career.
The Angels have won 11 of the last 16 games vs. Minnesota dating back to 2011.