4. Chris Morris- 17 balls -, Delhi Daredevils v Gujarat Lions, 2016:
The fourth fastest fifty was scored by big-hitting South Africa all-rounder Chris Morris. Chasing 173, Delhi Daredevils were reeling at 57 for 4 in the eleventh over. However, the match completely changed once the Protea star took his stance on the crease. He hit 7 sixes in the first 17 balls he faced and completed his half-century to set up a thrilling finish to the match. However, even his fighting 32-ball 82 runs knock went in vain as Delhi lost the match by 1 run.