By the end of October 2014, Mangan was joint top scorer at Shrewsbury, alongside James Collins, having scored six goals in all competitions. His seventh goal came days after the Chelsea match, equalising with a half volley away at Dagenham and Redbridge, before winning an injury time penalty which was converted by teammate Liam Lawrence to secure Shrewsbury's fifth straight win in the league. The requirement to carefully manage an ongoing knee injury restricted Mangan's match time over the next few months, although he still managed to score a late winner against Morecambe in December after coming on as a substitute. He marked his first start since November by scoring a brace and providing an assist in a 3–0 home win against Hartlepool United on 17 January 2015, to help move Shrewsbury back into the League Two automatic promotion places.