The left-back, who is under contract at Peterborough but available for transfer, has been training with the Millers over the last week or so and played 90 minutes in Saturday's 2-1 friendly win over Mainz.
He returned to London Road on Monday for Posh's photo call but could be involved in Rotherham's behind-closed-doors friendly at Sunderland where he could further push his claims for a deal with the Millers.
The left-back area, which was so problematic for Evans last season, is clearly still playing on the manager's mind, with Joe Mattock just coming back from an injury, the desire to play Aidy White in a more advanced role and the importance of Danny Collins at centre-back.
But Evans must decide whether Newell will get enough game time to warrant being offered a contract.
“The kid's been training with us for a few
days, so we're grateful to (Peterborough chairman) Darragh MacAntony for allowing Joe to come and spend
some time with us," Evans said.
"We've tracked him for quite a bit of last season. He's such a talented boy. The first person I have to speak to, of course, is our chairman. We like him.
"We've tracked him for quite a bit of last season. He's such a talented boy. The first person I have to speak to, of course, is our chairman. We like him.
"He is a different kind of player to what we've got. He's technically fantastic, he works really hard and you can play him anywhere on the left side or central.
“In many ways he can be an
asset, but we just have to look at the entirety of our squad and see if he is
going to play a meaningful part because he does belong to another football club.”
