Jeff started out by hosting "Live Audio Wrestling", the first wrestling/MMA program available on conventional radio. During the early days of the radio show he got the nickname "Gentleman" Jeff Marek. In 2003, after "The LAW" had moved from The Fan 590 to Talk 640, Jeff began to host the pre-game and post-game shows for Toronto Maple Leafs telecasts, leading to Jeff leaving "The LAW", to work full-time on his other on-air and behind the scenes roles at the recently rebranded Mojo Radio - Talk Radio For Guys. Eventually, Jeff would begin to host a daily talk show on the Toronto Maple Leafs in the afternoon, known as "Leafs Lunch". He also hosted his own radio show which aired after "Leafs Lunch", called "The Jeff Marek Show", until Mojo Radio rebranded its station AM 640 - Toronto Radio. In the summer of 2007, Marek became the sole-host of "Leafs Lunch", as well as co-host of "The Bill Watters Show", the afternoon-drive program on the station hosted by his former "Leafs Lunch" partner, former Maple Leafs Assistant GM Bill Watters.