Eagles second year defensive lineman Joe Kruger isn't the only returning player putting on weight this offseason. According to the Eagles Insider account, second year nose tackle Bennie Logan and offensive tackle Lane Johnson are bulking up as well.

Two second-year #Eagles who have attacked the offseason weight program: NT Bennie Logan is up to 315 pounds and Lane Johnson is now 317 — Eagles Insider (@EaglesInsider) May 19, 2014

The Eagles' official online roster previously listed Logan at 309 and Johnson at 310, so it's about a 7 pound gain for each player. Both players are often heralded for their athleticism but adding a little extra weight can't hurt, especially since they're getting stronger.

Here's a recent picture of Johnson and Logan via the Twitter account of Eagles safety Chris Maragos.

Update: Here's a new picture of Logan via @Eagles.

Now that's how you add six pounds of solid muscle during the #Eagles offseason. #FlyEaglesFly pic.twitter.com/7WGO19ZRQ6 — Philadelphia Eagles (@Eagles) May 20, 2014

Sports science for life.