The good: Jones steadily got better each season. A fifth-round draft pick in 2010 (157th overall player taken), he was arguably the best defensive lineman on the Ravens last season. Jones is a top-notch run-defender who can get to the quarterback. His 8.5 sacks over the past two seasons is two more than Haloti Ngata in that same span.
The bad: He was a full-time starter for one season, totaling 20 starts in four seasons. No one knows how effective he'll be without Ngata drawing double teams. Jones also had a heart issue at the start of the 2013 season, which caused him to miss the season opener.
The bottom line: Jones is generally ranked among the top 25 free agents available. He's going to get paid but likely not by the Ravens. The Dolphins and Jets have been linked as potential interested teams. The Ravens showed last year they weren't going to overpay to keep players they developed when they let Paul Kruger and Dannell Ellerbe sign elsewhere.