Dolphins sign two, waive three

The Dolphins began the process of reducing their roster to the 75-player limit on Monday, waiving three players and signing two, the club said. Joining the Dolphins are defensive tackle Cory Grissom and kicker Jake Rogers. Grissom, 24, has previously played for the Chiefs (2014) and Patriots (2013-14). He played collegiately at South Florida. Rogers, 27,…