Speaking on SEN Afternoons, Wallace explained that there are better, younger options down back for Geelong.
“I have not got in my starting lineup Henderson and Taylor,” he said.
“I’ve got a backline of (Zach) Tuohy, (Jack) Henry, (Tom) Stewart, (Jed) Bews, (Mark) Blicavs and (Jake) Kolodjashnij.
“I think it’s more mobile and more athletic, when the other two come in, I think it makes them a bit stodgy.”
Henry, 20, emerged as a promising young talent after playing 21 games and earning a Rising Star nomination in 2018.
The Cats selected Henry with Pick 16 in the 2016 Rookie Draft.
Meanwhile, the transition for the versatile Blicavs into the backline proved a revelation for the Cats last year.
Both Henderson (knee) and Taylor (foot) were limited to a handful of games in 2018 due to injuries.