The purpose of this study was to create a deeper understanding of the sources to novice coaches coaching efficacy. The following questions where used: (1) Witch sources do novice coaches perceive contributed to their coaching efficacy witch made them take the trainer mission?; (2) Witch sources do novice coaches perceive raise and lower their coaching efficacy?; and What attribution pattern uses novice coaches in relation to the sources they perceive increase and decrease their coaching efficacy. Semi-structured interviews where conducted with five novice coaches. An inductive analysis where conducted. All respondents perceived knowledge to be a contribution source for starting as a coach. During the trainer mission support was the most cited source. The stability of the respondents attribution patterns seems to be mostly varying. The sources to coaching efficacy that where found are discussed based on earlier work and entailments are given.