Leeds United boss Steve Evans was largely impressed with duo, but admitted Lewie Coyle struggled early on.
Leeds United beat Wolves 2-1 last night to record their second win of the season over Kenny Jackett's side.
They did so by freshening up their team which beat Reading 3-2 at the weekend, bringing in Lee Erwin and Lewie Coyle.
Erwin was a summer signing from Motherwell last summer, but has struggled since joining, sent out on loan to Bury and relying on sporadic substitute appearances.
Coyle made his debut earlier in the season after an injury crisis at right-back, and was selected in an unfamiliar midfield position.
Head coach Steve Evans told BBC Radio Leeds after the game that he was impressed with both players, but admitted Coyle struggled early on.
He said: "Both were having such a stunning spell in the second half, when we were really at it. Both were industrious.
"Lee, he gave the right-back a real problem. Coyle, he'll get developed, playing in different roles, understanding the game.
"He started the game looking lost on the right side, and was disappointed to come off. I said to him, you'll play again before the end of the season."
Leeds are at the stage of the season where they can afford to mix up the team selection and give fringe players and youngsters a chance.
Now is the time to find out what they really have with Lee Erwin and see if he can prove the management wrong in sidelining him all season, while Coyle is a more long term project.
Both players had to play out of position and face challenges to get into the team with Chris Wood and Gaetano Berardi secure in their spots, but it is to Evans' credit that he found room to get both players into the team regardless.