The 2015 McDonald's All-American Boys Game is an All-star basketball game that was played on April 1, 2015 at the United Center in Chicago, home of the Chicago Bulls. It was the 38th annual McDonald's All-American Game for high school boys. The game's rosters features the best and most highly recruited blue chip boys high school basketball players graduating in 2015. Chicago, which became the first city to host the game in back-to-back years in 2012, continues to host the game annually for the fifth consecutive time. When the rosters for the game were announced on January 28, 15 of the 24 players had committed to Division I basketball programs; Duke and LSU led the field with two commits each.

On March 10, 2015, Ben Simmons was named the Morgan Wootten Award winner, regarded as the McDonald's All-American national player of the year award. In the game, the East team—led by MVP Cheick Diallo's 18 points and 10 rebounds—defeated the West team by a 111–91 margin. In the associated Jam Fest, Dwayne Bacon, Luke Kennard and Jalen Brunson won the slam dunk contest, three-point shooting contest and skills competition, respectively.

At the time of the roster announcement the 24 players included 22 of the top 25 players according to the 2015 ESPN 100. The two highest rated players (Ben Simmons and Jaylen Brown) were both named to the East team. The West team roster was highlighted by Malik Newman. Based on ratings at ESPN.com, the highest rated eligible player not invited was number 18 ranked Texas A&M signee Tyler Davis. ESPN's number 24 ranked and Connecticut signee, Jalen Adams, is an ineligible postgraduate student. However, according to 247Sports.com's composite ranking, the highest rated non-invitee was 15th-ranked Arizona signee Ray Smith. Nine uncommitted players at the time of the roster announcement was regarded as a high total and was higher than the total of two the year before. Kentucky signee Skal Labissière (number 3 at ESPN and number 5 at 247Sports.com) was not eligible due to his athletic ineligibility after transferring. As of gametime, 8 players remained undecided on their college affiliations. 5 of the players were scheduled to begin play in the Dick's Sporting Goods High School Nationals the following day.

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