Long tore his ACL last October and missed the last nine games of the 2014 season. Long also tore his ACL and MCL in the same leg in December of 2013.
The Falcons list Jake Matthews, a former sixth-overall pick, as their starting left tackle. Ryan Schraeder starts on the right side.
Long was drafted No. 1 overall by the Miami Dolphins in 2008. He started all 16 games in each of his first three seasons, and made the Pro Bowl every year from 2008–11.
Long's career has been derailed by injuries since his streak of Pro Bowls. He has not played a full season since 2010.
In addition to the knee ligament tears, Long dealt with back and biceps injuries in Miami.
The St. Louis Rams, who signed Long to a four-year, $36 million deal in 2013, released him in March.
– Rohan Nadkarni