The 91st Drake Relays get into full swing tomorrow morning in Drake stadium. It will mark the final Relays for long-time director Bob Ehrhart, who announced his retirement after 31-years at the helm. Ehrhart says he has been too busy and the fact this is his final Relays has not hit him, yet.Several Olympic hopefuls will be part of the field but Ehrhart says the backbone of the meet remains the college teams that come from all over. He says they have 18 teams coming in that have either missed a year or not come to the relays before.The weather forecast is favorable and Ehrhart says that could lead to several records falling.