The Marlins on Friday parted with two pitching prospects to bolster their bullpen, as they acquired right-hander Aaron Crow from the Royals for Brian Flynn and Reid Redman.

In Kansas City, Crow was part of one of the top bullpens, posting a 6-1 mark with a 4.12 ERA and three saves in 59 innings last season. 

The Oakland Athletics have traded Josh Donaldson to the Toronto Blue Jays in exchange for four players.

For Donaldson, the A's will receive third baseman Brett Lawrie, right-hander Kendall Graveman, left-hander Sean Nolin and minor league shortstop Franklin Barreto.

Donaldson told the San Francisco Chronicle that he was playing video games when his agent texted him about the trade.

"I'm so shocked," Donaldson told the newspaper. "I just got off the phone with [general manager] Billy Beane, and I guess they got an offer that they couldn't resist. I'm definitely a little emotional about it. Oakland is my home. At the end of the day, it's a business, as much as it hurts emotionally. The guys in that clubhouse are my brothers."

Beane considers both pitchers ready for the majors.

"They had been pretty persistent, and we were pretty adamant that wasn't something we were willing to talk about," Beane said of dealing Donaldson. "We wouldn't have done the deal unless it addressed now and the future, and they were able to do that. This deal in our minds addresses a little bit of everything. It got pretty serious the last 48 hours. They were reluctant to give up all four players, and we weren't going to do it without those four players in the deal."

According to wins above replacement, only Mike Trout has been more valuable than Donaldson over the past two seasons.

The A's have filled their second key position in five days, acquiring first baseman Ike Davis and international bonus slot 86 from the Pirates in exchange for international bonus slot 27, according to an ESPN.com report on Sunday.

The 27-year-old Davis began last season with the Mets and batted .208 with a home run and five RBIs in 12 games before Pittsburgh acquired him for pitchers Zack Thornton and Blake Taylor.

A left-handed hitter, Davis then batted .235 in 131 games for the Pirates, finishing 2014 with a .233 overall batting average and 11 homers and 51 RBIs in 143 games.

The Los Angeles Dodgers have acquired Joel Peralta in a trade with the Tampa Bay Rays.

The Dodgers also received left-hander Adam Liberatore from the Rays, giving young right-handers Jose Dominguez and Greg Harris up.

Peralta, 38, pitched 69 games for the Rays last season, going 3-4 with a 4.41 ERA.

The deal was the first Major League trade under Andrew Friedman, who left the Rays for the Dodgers earlier this offseason.

The Rays recently picked up a $2.5 million option on Peralta for 2015.

The Diamondbacks have acquired right-hander Jeremy Hellickson from the Rays, according to an ESPN.com report.

The trade, announced Friday night, is the first major move by new Diamondbacks GM Dave Stewart. The Diamondbacks sent Tampa Bay two minor league prospects, infielder Andrew Velazquez and outfielder Justin Williams.

The New York Yankees have traded catcher Francisco Cervelli to the Pittsburgh Pirates for left-hander Justin Wilson.

Cervelli, 28, had played in parts of seven big-league seasons with the Yankees. A series of injuries cost him significant time recently and he had played in just 69 games over the past three seasons.

Wilson, 27, was 3-4 with a 4.20 ERA in 70 appearances for the Pirates this past season but struck out 61 batters in 60 innings.

The Astros have acquired catcher Hank Conger in a trade with the Angels, according to an ESPN.com report.

The Angels got right-hander Nick Tropeano and minor league catcher Carlos Perez in the deal Wednesday.

Adam Lind was traded from the Blue Jays to the Brewers on Saturday for right-hander Marco Estrada, ending the first baseman's nine-year run in Toronto.

The 31-year-old Lind hit .321 with six homers and 40 RBIs in 96 games last season, when he missed extensive time with a back injury and then a hurt right foot.