DETROIT -- Necessity motivated one of the Pirates' roster moves Monday before a game against the Detroit Tigers. The other added flexibility.
The Pirates called up infielder Josh Harrison and added left-hander Mike Zagurski from Class AAA Indianapolis, putting three left-handed pitchers in the bullpen against a Tigers team featuring three switch-hitters and left-handed Prince Fielder.
To make room for Zagurski on the active roster, the Pirates optioned right-handed pitcher Bryan Morris to Indianapolis. Zagurski was not on the 40-man roster, so the Pirates moved Jeff Karstens, whose rehabilitation from a shoulder issue was recently halted, from the 15-day disabled list to the 60-day list.
Harrison replaced Jose Tabata, who went on the 15-day disabled list because of a strained left oblique.
Zagurski, 30, had a clause in his contract that allowed him to opt out on June 1 if he was not on the active roster. He had allowed five runs in 21 innings and struck out 37 for Indianapolis this season.
"The numbers against left-handers have been good, but numbers against right-handers have been silly," Pirates manager Clint Hurdle said. "We feel this is a good opportunity for Mike."
The Pirates signed Zagurski as a minor league free agent in the winter. He previously appeared in the majors with the Philadelphia Phillies and the Arizona Diamondbacks.
Morris displayed good performance in 152/3 innings with the Pirates this season. He allowed six runs, three of them May 5 on a home run, but walked eight compared to nine strikeouts.
"If there's one thing for him to work on, it's pure fastball command," Hurdle said. "Other than that, gave us a shot in the arm, did some good things here, and I'm sure we'll see him again."
Harrison hit .279 with a .357 on-base percentage for Indianapolis this season and walked 16 times compared to 19 strikeouts. He played mostly shortstop and second base in the minors this year.
"Wanted somebody who can go defend in multiple places," Hurdle said. "He can defend in right field. He's played in both corners.
"They have three lefties in the bullpen as well. In leverage situations, they might try to pick on [Travis] Snider or [Garrett] Jones, we'll have another right-handed bat to maybe counter with."
Tabata, Hurdle said, hurt his oblique before the Pirates left Thursday for their five-game road trip. He played through it, but it didn't improve.
"Last few days, tried it, didn't feel confident going at game speed," Hurdle said. "Wasn't an option to play short against this ballclub [the Tigers]."
James McDonald did not complete one inning in his rehabilitation start Monday with Class AA Altoona.
In two-thirds of an inning, McDonald allowed two hits, one on a home run, and walked four. He was charged with three runs and left after 33 pitches, 14 strikes.
McDonald is on the 15-day disabled list because of shoulder pain. Monday marked his first rehabilitation start.
The Pirates scratched Starling Marte from the lineup Monday because of migraine symptoms. They replaced him in left field with Snider. Jones played right field and Pedro Alvarez served as the designated hitter. Brandon Inge, a Tigers player for parts of 12 seasons, started his first game at Comerica Park in an opposing uniform at third base.
Bill Brink: firstname.lastname@example.org and Twitter @BrinkPG.