The Detroit Lions finished up one of their most successful seasons – record-wise – in franchise history. Now, the offseason begins with the combine, free agency and the NFL draft.

To start that process moving, we’ll look at each position group over last week and this week analyzing what worked, what didn’t and projecting what could happen between now and training camp, a little more than six months away.

Previous analyses: Quarterbacks; Running backs; Wide receivers; Tight ends; Offensive tackles

2015 Free Agents: Dominic Raiola, Rob Sims; Garrett Reynolds

The good: After a rough stretch at the beginning of the season, Sims regained his form and had a strong second half of the season. He also was the only lineman to start every game this season. He graded out as the best screen-blocking guard in the league according to Pro Football Focus. Whether that’s enough to bring him back is another question. Larry Warford was again Detroit’s best offensive lineman, although he had a pair of knee injuries this season. Warford graded out by PFF as the No. 16 guard in the league. He committed only one penalty all year. Travis Swanson had growing pains as a rookie but showed signs of promise that an offseason could provide. Reynolds played well on the interior in the playoff game in place of Warford/Swanson.

The bad: Raiola did not have a good season after a 2013 where he had one of the best years of his career. PFF graded him out as the worst player on offense for the Lions and the No. 37 center in the league. He was also suspended for the regular-season finale against Green Bay – the biggest Lions regular-season game in more than a decade. Sims had a rough stretch at the beginning of the season. Swanson, as mentioned, had rookie pains. As a group, they allowed 12 sacks and 64 hurries according to PFF. For perspective, the interior line allowed one sack and 41 hurries of Matthew Stafford in 2013.

The money (using 2015 cap numbers from ESPN Stats & Information): Warford is slated to have a cap number of $849,250 – including a $25,000 workout bonus. Swanson has a cap charge of $699,868 – including a $25,000 workout bonus. Rodney Austin, in the final year of his deal, has a cap charge of $585,000 and no dead money.

Potential cuts: None before camp. Warford and Swanson will make the roster. Austin is going to have to have a strong offseason and camp to be around another season.

Draft priority: Very high. This is potentially an area where Detroit could use its No. 23 pick in the first round. The Lions, who will almost assuredly make moves here in free agency as well, need to find a third starter on the interior, especially if they don’t bring back Sims or Raiola.