HOUSTON — The Chicago Cubs acquired outfielder Austin Jackson from the Seattle Mariners on Monday, boosting their depth for their run at a possible playoff spot.

Chicago sent a player to be named and an international draft slot to the Mariners. The Cubs, who also got cash back in the deal, then designated infielder Mike Olt for assignment to make room on the roster.

Because the deal was made before Sept. 1, Jackson will be eligible for the postseason if the Cubs get that far. Chicago began the day with a 5 1/2-game lead over San Francisco for the second NL wild card.

“Austin Jackson — I’ve seen him for a long time in the American League. He’s a really good player,” said manager Joe Maddon, who is in his first year with the Cubs after a long run with Tampa Bay.

The 28-year-old Jackson was hitting .272 with eight homers and 38 RBIs in 107 games this season.

The Cubs placed right fielder Jorge Soler on the DL on Aug. 24 with a strained left oblique.