The Kansas City Royals have plugged a hole in center field by agreeing to sign Jon Jay.

Jay agreed to a $3 million, one-year contract Tuesday, and could earn another $1.5 million in performance bonuses. Kansas City made room for Jay by placing pitcher Jesse Hahn on the 60-day disabled list with an elbow injury.

With Lorenzo Cain leaving to sign with the Milwaukee Brewers, the Royals lacked an experienced center fielder to cover the spacious Kauffman Stadium grass.

Jay has a .996 career fielding percentage, the highest of any active major-league outfielder with a minimum of 500 games. He has appeared in 648 games in center during his eight-year career with the St. Louis Cardinals, San Diego Padres and Chicago Cubs.

Jay did not commit an error in 141 chances last season and enters this season with a 189-game errorless streak.

He hit .296 in 141 games last season with the Cubs, including .325 (13 for 40) as a pinch-hitter. Jay, 32, also is a left-handed hitter, which is attractive to the Royals, who have a predominantly right-handed hitting lineup.

Hahn, who was acquired from Oakland in a trade for Brandon Moss, experienced elbow discomfort in his start Thursday.

It has been diagnosed as a right ulnar collateral ligament sprain.

Outfield prospect and former first-round draft pick Bubba Starling has also been shut down with an oblique issue.

He was limited to 80 games last season with Triple-A Omaha because of an oblique strain.

Oakland releases Moss

Designated hitter Brandon Moss has been released by the Oakland Athletics.

Moss was acquired from Kansas City on Jan. 29 and was 4 for 10 with two walks in four spring training games.

He was designated for assignment when Oakland claimed left-hander Jairo Labourt off waivers from Cincinnati on Sunday.

Moss is guaranteed $7.25 million this season and a $1 million buyout of his 2019 club option.

He was acquired Kansas City on Jan. 29 along with left-hander Ryan Buchter for right-handers Jesse Hahn and Heath Fillmyer, and the Royals agreed to pay Oakland $3.25 million.

If the 34-year-old Moss signs with another team, a prorated share of the $545,000 minimum would be offset against what he is owed by the A’s, who announced his release Tuesday.

Moss hit .207 with 22 homers and 50 RBIs in 118 games for Kansas City last year and has a .237 average with 160 homers and 473 RBIs in 11 big league seasons. Darvish hitless debut

Yu Darvish threw two hitless innings in his spring training debut for the Chicago Cubs, facing his former teammates on the Los Angeles Dodgers.

Darvish struck out four, including Corey Seager, Matt Kemp and Yasiel Puig in the opening inning.

The Japanese star allowed one run when Chris Taylor walked leading off the game and circled the bases on a pair of wild pitches around a stolen base.

Signed to a $126 million, six-year deal, Darvish says he’s enjoying wearing the new uniform.

Darvish is coming off a World Series in which he twice was hit hard by the champion Houston Astros, including a rough outing in Game 7 at Dodger Stadium.

Return of bullpens

Arizona Diamondbacks announced Tuesday they will use a bullpen cart — topped by the requisite oversized team cap — to transport pitchers from both bullpens at Chase Field nearly a quarter-century after relievers stopped catching rides to the mound.

The last known time a team in the majors used a motorized vehicle — some clubs had actual cars — to relay relievers was 1995, when the Milwaukee Brewers shuttled them in a motorcycle with a sidecar.

Baseball historians have tracked the use of bullpen carts to 1950, when the Cleveland Indians first used a “little red wagon.”

The first official use came in 1951 with the Chicago White Sox.