Muirhead began his career with Kilmarnock, with his first chance in the Kilmarnock first-team coming in May 2013 when he made his senior debut as a 60th-minute substitute in Scottish Premiership clash with St. Mirren.
The following campaign proved to be the versatile forward’s break-out campaign as he made 21 appearances top-flight appearances and scored two goals, including a 90th-minute equaliser away at Partick Thistle.
He started the 2014/15 season in terrific fashion, scoring twice in the first month of the season. As well as playing regularly for Killie, Muirhead earned four international caps for Scotland Under-19s and also got on the scoresheet twice – one of those being a sensational 40-yard strike against Holland which was shortlisted for Goal of the Year by UEFA.
In January 2015, Dundee United signed the then 18-year-old for a reported £150,000. He scored twice for the Tangerines before the end of the campaign, helping them to a fifth-place finish in the Scottish Premiership.
Muirhead joined Partick Thistle on loan at the start of the following season and made eight appearances for the Jags. His stand-out performance came in a 5-2 triumph over his former club Kilmarnock, where he scored twice in the space of just 13 minutes.
The 6ft 3in forward then returned to Dundee, who had changed their manager during his time away. He left Tannadice Park at the end of the 2015/16 season and signed a one-year deal with Heart of Midlothian, managed by now-Dons boss Robbie Neilson.
Muirhead established himself as a key member of the Hearts side during the first half of this season. In Neilson’s final match in charge – a 2-0 win over Rangers – it was the 20-year-old who scored both the goals either side of half-time.
After signing him for the second time this season, Neilson will be hoping to see similar showings from his new forward at Stadium MK.