"We were hoping Feleti would be clear to play but his knee isn't quite right,'' coach Matthew Elliott said. "That's disappointing but, on the other hand, it's great having Thomas back.
"He was a really important part of our spine last year. He's obviously very handy in the halves and also gives us cover at hooker. We probably made a mature decision not to play him last week. He's a fairly useful bench player.''
While Leuluai's return is significant, the match will also mark Simon Mannering's 92nd game as captain, overtaking the mark set by Steve Price, and centre Dane Nielsen will also make his 100th NRL appearance.
Mannering is also just eight short of becoming only the second Warriors player to rack up 200 NRL games for the club (Stacey Jones made 261 appearances).
"Simon commands so much respect from everyone in the club,'' said Elliott. "He's such a high-quality player and leader as well as being a fine person.''
Mannering, in his fifth season as captain and his 10th as an NRL player, will achieve his record in a city which was briefly home for him before he moved to Auckland after signing with the Warriors.
Warriors side to play Wests Tigers at Westpac Stadium, Wellington, on Saturday (5pm): Sam Tomkins, Glen Fisiiahi, Dane Nielsen, Jerome Ropati, Manu Vatuvei, Chad Townsend, Shaun Johnson, Sam Rapira, Nathan Friend, Ben Matulino, Jayson Bukuya, Simon Mannering (c), Sione Lousi. Interchange: Jacob Lillyman, Suaia Matagi, Konrad Hurrell, Thomas Leuluai.