Grehan is excited to join Doncaster Rovers. He said that he was talking to the team's manager for a couple of weeks and was eager to join the team. He was impressed by the team's performance last season and is looking forward to playing in League One.

Grehan has had some experience playing for other teams through loan spells. He is now looking for a place to settle and play regularly. He believes that Doncaster Rovers is the right team for him, and he is delighted to be joining the team.

Doncaster Rovers' manager, Grant McCann, is also pleased to have Grehan on board. He describes Grehan as a player with a lot of potential. McCann says that Grehan excelled in his loan spell at Bohemians and is currently the captain of the Republic of Ireland U21s team. He believes that Grehan's age and skills make him an ideal player for the team.

McCann also thanked Crystal Palace for their cooperation in the transfer deal. He said that the team was able to secure Grehan on a long-term contract, which will allow them to develop his skills further. He believes that Grehan's character, skills, and playing style fit well with the team's goals and values.