The pair come into the squad for Brendan Doggett and international recruit Mujeeb Ur Rahman who was player of the match in last night’s win over the Perth Scorchers at the Gabba.
Mujeeb will return home to Afghanistan today and will miss the Heat’s final two remaining round games.
Heat general manager Andrew McShea said the teenage spinner had requested to travel home early due to a family illness and a looming Afghanistan camp.
“We discussed the circumstances with him and agreed it was best for him to go home now,’’ he said.
“He’s enjoyed his time in the BBL and we’ve enjoyed having him. We certainly wish him well for his coming international commitments.”
The 17-year-old spinner claimed 3-16 from four overs against the Scorchers with his player of the match effort helping him to 12 wickets at 6.04 runs an over for the tournament.
Steketee was in action in the Toyota Futures League 2nd XI T20 competition in Sydney during the week, with the Queensland Academy of Sport winning all six of their games.
Heat captain Chris Lynn last night became the all-time leading runs-scorer in the BBL, eclipsing the record held by Michael Klinger.
His 56 not out last night took him to 1945 runs so far, with his mark of 16 half centuries also a record.