Celtics’ Horford enters NBA’s concussion protocol

Al Horford is in his second season with the Celtics.

Boston Celtics starting center Al Horford will miss tonight’s game against the Los Angeles Lakers, as the four-time All-Star has entered the NBA’s concussion protocol, the team announced.

Horford has been playing great basketball so far this season and is a big reason why the Celtics enter Wednesday with the best record in the Eastern Conference at 9-2.

The 6-foot-10 big man is averaging 14.6 points, 9.2 rebounds and 4.7 assists, shooting an efficient 53.1 percent from the floor and 47.4 percent from three.

Boston started the year 0-2 but have since won nine straight behind the stellar play of Horford and Kyrie Irving. Head coach Brad Stevens has not announced who will replace Horford in the starting lineup.