It was reported earlier Tuesday by CBSSports' Jon Heyman that Byrd had been claimed on waivers.
Before the July 31 non-waiver trade deadline, the Pirates had been searching for an outfield bat, and Byrd was one of the players indicated as a target.
Heyman reports that the Mets will receive second base prospect Dilson Herrera, who represented the Pirates in the Futures Game this year at the 2013 MLB All-Star Game at Citi Field. Herrera was rated as the No. 11 prospect in the Pirates' system by MLB.com.
Heyman also noted on MLB Network's The Rundown that a player-to-be-named later will be headed to the Mets as well as cash considerations for Buck's contract.
Byrd is on pace for a career year in several areas. He is hitting .285 with 21 home runs, 71 RBI and has produced a 3.5 WAR so far, according to Fangraphs. A downside to the free-swinging Byrd is the strikeouts (124).
With Starling Marte on the 15-day disabled list, the addition of Byrd certainly isn't a shock.
Buck is hitting a measly .215 but has the pop to be productive off of the bench, which is presumably the role he would serve behind Russell Martin. The 33-year-old veteran has 15 home runs and 60 RBI and is serviceable behind the plate as well, throwing runners out at a 30 percent rate this season.
With a game in hand and a crucial six-game homestand looming, the Pirates will look to start off the most important stretch of games PNC Park has ever seen Tuesday as the Milwaukee Brewers come to town. The trip back to the friendly confines on the North Shore is just half of a 12-game span that will see six games against the Brewers and six games against the NL Central-leading St. Louis Cardinals.
It can be argued that the final nine games will be just as key, as the Pirates face off against the Cincinnati Reds in six of those nine showdowns, however, the tone for the final 20 games of the season can be set with this upcoming stretch.
The Pirates are a meager 5-5 in their last 10 games and are currently on a two-game losing streak heading into the series with the Brewers. Since the All-Star break, the Bucs are 20-17 and are just 25-24 since the beginning of July.
Despite the fall back to mediocrity, the Pirates only recently lost sole possession of the NL Central lead Sunday to the Cardinals—a lead that had been held since July 30.
Byrd and Buck should provide an added boost to the offense during this crucial run to the playoffs.
Jeff Locke (9-4, 3.01 ERA) will square off against Kyle Lohse (9-8, 3.22) at 7:05 p.m. EDT Tuesday.