"Gambling appears to have been widespread within the Lions organization last season.
In addition to today’s bombshell announcement that four Lions players have been suspended for gambling, ESPN reports that several Lions staff members in various departments were fired last month for violating the gambling policy.
Staff members of NFL teams are not allowed to bet on NFL games, the draft, postseason awards or anything else NFL-related, and they’re also not allowed to gamble on anything at all while they are at the team facility or traveling for team business. It is not clear specifically which rules the Lions employees violated."
Report: Lions fired several staff members in multiple departments for gambling (yahoo.com)