Horford will start Friday's game against the Magic, Gary Washburn of The Boston Globe reports.
Horford will slide into the starting lineup due to Jrue Holiday (ankle) being unavailable. This will be Horford's fourth start of the year. He's averaged 8.3 points, 6.7 rebounds, 3.3 assists and 2.0 blocks in 31.7 minutes per game across his previous three starts.