After getting his start as a homebrewer, Rob Welch earned his stripes at Montreal’s Brasserie McAuslan before going on to become a staff brewer for Mill Street. A scientist specializing in DNA biophysics in his previous career, Welch’s mathematical approach to brewing helped Left Field win a gold at the Canadian Brewing Awards last year. One of Toronto’s craft brewing heavyweights, Left Field is known for its bold, distinctively-flavoured beers, which are on tap at dozens of bars and restaurants across the city.