DEVELOPING: Dale Jr. Retiring After 2017

((Photo Courtesy: By Don Ramey Logan - Own work, CC BY-SA 3.0, Wikipedia))

It started with a simple tweet this morning, but it's a time when a simple tweet isn't all that simple...

After being out for the final half of the 2016 season with concussion symptoms and starting 2017 in frustrating fashion on the track- one top-10 this year in eight starts and 24th in the season standings- Earnhardt is deciding to park.

Here was the end of Dale's day in Bristol Monday...

((HT: NBC Sports/NASCAR on FOX))

Hendrick Motorsports has no immediate announcement on filling the seat...