Former Bradley guard Walt Lemon Jr. has signed a contract to join the Chicago Bulls for their last six games.

The 6-foot-3 Lemon spent this season with the Windy City Bulls of the G League, where he averaged 20.9 points (11th league wide) and 8.4 assists (second) in 43 games. He helped Windy City rally from a 5-12 record to make the playoffs; they were eliminated Wednesday night.

This won't be Lemon's first NBA experience. He appeared in five games with the New Orleans Pelicans last season, averaging 3.4 points on a 10-day contract. He played four preseason games with the Boston Celtics this season.

Lemon played at Bradley until 2014. He left among the school's all-time leaders in points (1,721, seventh), assists (367, 10th) and steals (222, third).

Chicago announced Wednesday that forward Lauri Markkanen will miss the remainder of the season after experiencing a rapid heart rate and fatigue.

Markkanen joins a long list of unavailable Bulls players. Wendell Carter Jr., Chandler Hutchison and Denzel Valentine all had season-ending injuries. Leading scorer Zach LaVine (bruised right thigh, right knee tendinitis), Otto Porter Jr. (strained right rotator cuff) and Kris Dunn (back) were unavailable Wednesday.

The Bulls are 21-55 and have six games remaining in the regular season. They have three home games remaining: Saturday against Toronto; April 6 against Philadelphia; and April 9 against New York.