Hull FC coach Peter Gentle is considering giving 20-year-old scrum-half Jacob Miller his debut in Friday's Super League game at Castleford Tigers and has not yet ruled out injured skipper Gareth Ellis.
Second rower Ellis suffered a painful back injury playing for England in their 30-10 win over the Exiles at Warrington on Friday but has made a quick recovery.
"It looked quite nasty when it happened but it's more muscular than anything else," Gentle said.
"He's an outside chance of playing on Friday night, although we won't take any risks. I've got great players who can play in his position."
Miller, who flew in from Sydney on Saturday to take up a two-and-a-half-year contract with the Black and Whites, put himself in contention after impressing Gentle during his first training session with his new team-mates today.
The former Wests Tigers half-back, who has played for the Junior Kangaroos, has spent the last four weeks waiting for his visa but got some game time with Wests Tigers' junior team after losing his first-team spot.
"I was impressed with how easy he fitted in and what he did with the bit of ball work that we did," Gentle said.
"My heart says let him play. He's desperate to play but I'll wait and see how the week unfolds.
"He has a lot of things going on. He only arrived on Saturday so he's got jet-lag to contend with and he's in a new city and he's trying to find some property.
"I'll wait and see how he is mentally but he's had a look at our games and he knows all our plays.
"He didn't miss a beat today. He did all the conditioning work so he's looked after himself while he's been out of the game.
"He says he's really missed the team environment and he was like a pig in mud out there."
Miller, who started Wests Tigers' first four NRL matches this season under former Bradford Bulls boss Mick Potter, told a news conference at the KC Stadium today that he will be ready to play on Friday.
"I feel like I'm ready to go if I'm selected," said Miller, who made his NRL debut at the age of 18. "I don't know what Peter's got in mind.
"I'm very glad to be here. It was a long time coming, waiting for my visa.
"It's a great challenge for me, coming over and testing myself against the players over here."
Gentle, who coached Miller at the Tigers, made an unsuccessful attempt to sign him during the close season and believes he can make a big impact on the team in the long term.
"I don't think you will see the best of him until next year after he does his pre-season with us," Gentle added.
"He is a fast learner but I'm not putting any expectations on him. We'll keep it quite simple and see how it develops week to week.
"He's a good kid. You'll see the players around him flourish and become better players. It's going to free Daniel Holdsworth up to play his natural game."
Miller was signed as a replacement for fellow Australian Brett Seymour, who was released by Hull earlier this year.