New Bolton manager Keith Hill has rebuilt their depleted squad with the addition of nine players on transfer deadline day.
Wanderers have lost their last three games 5-0 and and have yet to score in the league in their opening five games, sitting bottom of the table on -11 points following a 12-point deduction for entering administration.
The Trotters have been forced to field youth team players due to the financial strife which left the club on the brink of liquidation before the sale to Football Ventures (Whites) Limited was completed last week.
Bolton-born former Rochdale boss Hill was appointed as manager over the weekend after Phil Parkinson's resignation last month and his immediate task was to build a squad capable of competing in League One.
Defender Jake Wright has been brought in to add some experience to their overworked backline after joining on loan from Sheffield United until January.
The 33-year-old made 30 appearances for the Blades as they won the League One title in the 2016-17 season.
Fellow midfielder Will Buckley rejoined the club after agreeing a short-term deal.
O'Grady joins after leaving Oldham and 36-year-old Murphy left Nottingham Forest before signing for the rest of 2019-20.