The Boston Red Sox acquired right-hander Jake Peavy from the Chicago White Sox before the MLB trade deadline in hopes to improve their starting rotation. (David Banks/GETTY IMAGES)

The Major League Baseball trade deadline was today and teams across the nation were actively looking for pieces to upgrade their rosters. Teams had until 4 p.m. ET to file their paperwork with the league to finalize the trades. Among those traded were the Chicago White Sox’s Jake Peavy to the Boston Red Sox, Arizona Diamondbacks’ Ian Kennedy to the San Diego Padres and Houston Astros’ Bud Norris to the Baltimore Orioles.

The Red Sox are looking to strengthen their starting rotation with the acquisition of Peavy.

The Boston Red Sox took a gamble Tuesday night, beefing up their starting rotation by acquiring Jake Peavy and giving up talented defensive player Jose Iglesias in a three-team, seven-player deal on the eve of the trade deadline.

In the closest thing to a “whoa” trade so far, the Red Sox sent Iglesias to the Detroit Tigers along with three prospects (J.B. Wendelken, Francelis Montas and Cleuluis Rondon) and, in addition to obtaining Peavy from the Chicago White Sox, also acquired Brayan Villarreal, a Class AAA righthander, from Detroit. Chicago also obtained outfielder Avisail Garcia, a top prospect who was the key player for them in the deal, from Detroit. In Iglesias, the Tigers have someone who could step in if/when Jhonny Peralta is suspended because of his involvement with the Biogenesis clinic.

The Red Sox can use Peavy, one of the best starters on the market this year, while they await the return of Clay Buchholz from the disabled list in late August or early September.. . .

Peavy, 32, won the Cy Young award with San Diego in 2007 and is 8-4 with a 4.28 ERA in 13 starts this season. More importantly, in 45 starts since the beginning of the 2012 season, he has won 19 games and has an ERA of 3.61. He is under contract through the 2014 season, making him even more appealing to the Red Sox.

Cindy Boren

Kennedy, 28, had a breakout 2011 season in which he went 21-4 and had a 2.88 ERA, but has struggled since leading the Diamondbacks to the 2011 National League Division Series.

Kennedy, 21-4 two seasons ago, is 3-8 with a 5.23 ERA in 21 starts and hasn’t won a game in two months.

General manager Kevin Towers has said the team needed a situational left-hander in the bullpen and he got one in Thatcher, who is 3-1 with a 2.10 ERA in 50 games this season.

The Diamondbacks also got 23-year-old right-hander Matt Stites, who is 2-2 with a 2.08 ERA and 14 saves in 46 games with Double-A San Antonio.

Arizona has lost three straight and is 3.5 games behind first-place Los Angeles in the NL West. San Diego is 8.5 out.

San Diego general manager Josh Byrnes said the Padres are excited to add a pitcher of Kennedy’s pedigree, even though the right-hander has struggled mightily of late.

Associated Press

The Orioles acquired right-hander Norris to help a rotation that is missing injured Jason Hammel.

The Orioles are sending outfielder L.J. Hoes and left-handed prospect Josh Hader to the Astros in a deal agreed to moments before Wednesday’s non-waiver trade deadline.

Hammel is being placed on the 15-day disabled list with a flexor mass strain in his right forearm. He is 7-8 with a 5.20 ERA in 21 starts this season.

The 28-year-old Norris was 6-9 with a 3.93 ERA for the Astros. He was making a club-high $3 million this year. In his fifth big league season, Norris is under team control through 2015. He is 34-46 with a 4.33 ERA.

Hoes is one of the Orioles top prospects. A third round pick in 2008, Hoes was hitting .304 for Triple-A Norfolk.

Associated Press