On Thursday, Pittsburgh Steelers quarterback Ben Roethlisberger officially announced his retirement. After 18 seasons with the franchise, Roethlisberger decides it's time to walk away from the game. Former legendary head coach Bill Cowher made sure to provide his two cents on the quarterback's career.

Cowher took to Twitter and delivered a heartfelt message to the veteran quarterback. The duo won a Super Bowl together, which was Ben Roethlisberger's first of his career. Now, the Steelers' former head coach lets the world know how he feels about Roethlisberger.

This is such a cool moment for Steelers fans. Many believe Cowher to be one of the best coaches in franchise history. Meanwhile, many believe the same can be said about Ben Roethlisberger out of the quarterback position. Pittsburgh fans are likely in their feelings on Thursday, as the franchise officially enters a new era.

We'll see what Roethlisberger decides to do in retirement. A handful of former NFL players have taken media jobs or have begun their careers in coaching. For Ben Roethlisberger, he could opt to go that route, or he could sit back and just enjoy retirement. Either way, the Steelers legend will have plenty of options at his disposal.

For the Steelers, their search for Ben Roethlisberger begins. Mason Rudolph and Dwayne Haskins are currently on the roster. However, Pittsburgh would be wise to acquire another quarterback to compete for the starting job. They'll have free agency, the NFL Draft, or could perhaps seek a trade. Either way, this franchise will have a busy offseason ahead.