Trent Boult after picking the wicket of Marcus Stoinis on the first ball of the IPL Final has made a record of taking the highest wickets in an IPL season. Boult has taken 8 wickets in IPL 2020 in the first over. 

List of top-5 bowlers who have the highest wicket-takers in the first over of an IPL season:

Trent Boult - 8 Wickets (IPL 2020)

Bhuvneshwar Kumar - 6 Wickets (IPL 2016)

Zaheer Khan - 5 Wickets (IPL 2012)

Praveen Kumar - 5 Wickets (IPL 2013)