After successfully progressing through the Bolton Wanderers academy youngsters Jay Lynch, Sanmi Odelusi, Alex McQuade and Andy Kellett have all signed their first professional contracts with the club.
Lynch, Odelusi and McQuade, all 19, and Kellett, 18, have all put pen to paper on one-year professional deals after impressing last term.
"All four have earned the right to progress and secure contract," Owen Coyle explained. "They know that they have to keep working hard in order to maintain their development."
In addition to the four youngsters, Wanderers have also recruited 19-year-old free agent Joe McKee following his release from Lancashire neighbours Burnley.
Attacking midfielder McKee has represented Scotland at under-19 level and during his recent spell at Turf Moor was loaned out to Scottish Premier League side St Mirren, where he made his debut against Celtic.
Coyle added: "Joe is a young player who I have worked with before. He will go into our development squad under John Henry.
"It's a good opportunity for him and I know that he will give 100 per cent."