The openside flanker, who turns 22 on St Patrick's Day, is only into his first year at the club but will be eligible for Ireland in two years.
However, Heenan's quest has had a spanner thrown in the works as he has suffered a season-ending shoulder injury in last weekend's game.
Meanwhile, in other European rugby news, former All Black Rene Ranger has scored two tries for big paying French club Montpellier on their way to a 50-19 win over Perpignan.
Ranger's scoring accounted for two of his side's five tries, which eventually helped Montpellier to move into second place in the Top 14 competition.
Montpellier now sit two points from the top spot, held by Clermont.