Finn was at his creative best in Featherstone’s 23-8 win at title rivals Leigh Centurions, while Middlehurst scored a hat trick of tries as Kingstone Press Championship One leaders Crusaders beat Gloucestershire All Golds 66-4.
Both players record the maximum five points towards their respective competition’s Player of the Year award at the end of the season.
Finn, a past Player of the Year at this level, led Rovers to a dominant second half performance after the sides were locked together at 6-6 at half-time.
Finn scored one try, made another, and finished with three goals and a drop goal in the 23-8 Featherstone win.
“Liam was the best player on the field,” Rovers coach Ryan Sheridan said.
“We were playing with one half-back, and he dominated the game.”
Crusaders second row Gary Middlehurst scored a hat-trick in his side’s 66-4 win over Gloucestershire All Golds.
North Wales coach Clive Griffiths said: “He popped up all over the place against the All Golds.
“He’s got durability and a great desire to play every week. He enjoys playing the game and the challenges it throws up, and that’s something that’s rubbing off on the other lads.”
Griffiths added: “Gary gets on with his job and you know the opposition have got to watch him, which creates space for others. He helps with our attack, is solid in defence, and he’s very coachable.”