Complex sentence: From Guelph, Ontario, Carroll worked with the Toronto Blueshirts of the National Hockey Association and was then hired by Charlie Querrie in December 1917 to be assistant manager and coach of the new Toronto NHL franchise.
Split into simpler sentences: From Guelph, Ontario, Carroll worked with the Toronto Blueshirts of the National Hockey Association. In December, 1917 Dick was then hired by Charlie Querrie to be assistant manager and coach of the new Toronto NHL franchise.