Amir scythed through the Royals top-order with a sensational spell of seam bowling upfront by snaring four wickets in the Powerplay.
Mortaza endured a torrid run in the 50-over marquee event where he managed a solitary wicket across eight games.
'I still have that love for the game and that passion for the game as well. And I would love to carry on as long as possible' - Gayle
Skipper Shanaka scored 75 off 31 before bowlers steamrolled Rangers' batting line-up
Kayes scored 61 off 38 balls whereas Walton made 49 off 30 balls as Challengers won
Hasan Ali, Mohammad Nawaz, Imran Farhat among captains named for Pakistan Cup
PSL 2021: How the squads stack up after the draft
The PSL 2021 Player Draft: Live Blog
Hasan Ali returns to Test side, Pakistan name nine uncapped players for South Africa series
HBL PSL 2021: Rashid Khan, Chris Gayle, Dawid Malan in star-studded Platinum roster
Rabada returns, Baartman and Dupavillon earn maiden call-up for Pakistan Tests
PSL 2021: Kings-Gladiators clash to kick off event; final to be held in Lahore
Ben Stokes Ashes miracle was playing on my mind - Hasan Ali on QeA Trophy final heroics
PSL 2021: Alex Hales traded to United, Colin Ingram to Kings; Zalmi release Hasan Ali
Faheem Ashraf credits Mohammad Yousuf for batting refinement