Career
Early career
Mühren made his professional debut for boyhood club Football Club Volendam on 5 August 2011, playing the full ninety minutes in a Eerste Divisie match against Football Club Dordrecht. The game ended 0-0. His first goals for the club came in an Eerste Divisie match on 30 September, netting twice in the first half as Volendam defeated Fortuna Sittard 3-2. = 2013-2014 On the opening day of the 2013-2014 Eerste Divisie season on 3 August 2013, Mühren scored all of Volendam"s goals in a 3-2 away victory over Almere City.
In a KNVB Cup match against Eredivisie heavyweights Ajax on 25 September 2013, Mühren netted a brace as Volendam fell to a 4-2 defeat in extra time.
On 10 February 2014, Mühren netted twice in the first half before completing his hat-trick in the second half, as Volendam defeated Jong Football Club Twente 4-2. In the 32nd round of the Eerste Divisie tournament on 21 March, he scored in either half as Volendam defeated Jong PSV by a score of 3-1 at the Kras Stadion.
By scoring in Volendam"s next fixture, a 2-1 defeat to Excelsior on 28 March, Mühren reached 24 league goals for the season and had completed a remarkable run of scoring in eight of his previous ten appearances. Arizona
On 28 August 2014, Mühren signed a three-year deal with Arizona Alkmaar, leaving for a fee of 350.000 euros.