By Matt Hladik It is the end of an era in Atlanta. The Falcons traded quarterback Matt Ryan to the Indianapolis Colts this afternoon. The No. 3 overall pick in the 2008 NFL Draft, Ryan was a stalwart over 14 seasons with the Falcons. Today’s move leaves Atlanta with a major void at the most important position. According to NFL Network’s Mike Garafolo, they have their sights set on a free agent target to replace Ryan: Marcus Mariota. Mariota spent the last two seasons with the Las Vegas Raiders, serving as the backup to Derek Carr. Prior to that, he spent five seasons with the Tennessee Titans …