Back in June, Russell Wilson wrote a public letter to his sister Anna, who was graduating from high school and is headed to Stanford on a basketball scholarship.

But Anna's college career got off to a rocky start, as detailed by Michael Weinreb of Bleacher Report. During a practice for the McDonald's All-American Game last spring, Anna got elbowed in the head and suffered a concussion.

She struggled through the symptoms all summer long before returning to practice in November. When Anna got back on the court, she didn't look like the same player that Stanford had recruited.

Wilson ended up reaching out to Sidney Crosby for advice on how to help his sister:

"So Russell spoke to a friend, NHL star Sidney Crosby, who has a history of concussions. Late in November, with Crosby's recommendation, Anna went to the Carrick Institute, a neurology clinic in Florida, to work with Dr. Matthew Antonucci. Five days of intensive rehab and diagnostic testing, Anna says, helped her get over the last of her symptoms. Her balance improved; her vision cleared. For the first time since taking that hit eight months earlier, basketball became a priority."

Anna is still working her way back, and she scored 11 points in a game in late December.

The whole article can be found here and is worth a read.