Justin Adam Maxwell
- Bats Right, Throws Right
- Height 6' 5", Weight 225 lb.
- School University of Maryland
- High School Sherwood High School (Sandy Spring)
- Debut September 5, 2007
On March 31, 2013, he became the sixth player to hit two triples on Opening Day; it was the Houston Astros' first game as an American League team and his two long hits paved the way to an 8-2 win over the Texas Rangers. He was hitting .237 after 19 games as Houston's regular centerfielder when he was hit by a pitch by Hisashi Iwakuma of the Seattle Mariners in the 3rd inning on April 23rd. He suffered a fracture in his left hand and was immediately placed on the disabled list. He returned on June 18th, but a week later, on June 25th, he suffered a concussion when he banged his head against the turf diving for a ball in a game against the St. Louis Cardinals. He came back on July 13th, but the injuries meant that he had lost his starting job in Houston, the team having a number of younger outfielders available. He was hitting .241 with 2 homers and 8 RBI in 40 games when he was traded to the Kansas City Royals on July 31st, in return for minor league P Kyle Smith. On September 22nd, he was the hero in a key game for the Royals, who were battling for a wild card spot at that late stage of the season: batting in the 10th inning of a scoreless tie with the Texas Rangers with two outs and a full count, he sent a pitch by Joakim Soria over the fence at Kauffman Stadium for a walk-off grand slam.