On Friday morning, San Francisco 49ers head coach Kyle Shanahan said he has high expectations for rookie linebacker Reuben Foster, who was recently named the NFL's Defensive Rookie of the Month.

"When Reuben is out there, I think everyone can see he is a very good player but by no means has he fully arrived," Shanahan said on KNBR. "He's still got a long way to go, still can get a lot better."

While Foster has only played in five NFL games, the rookie has looked pretty good so far. That was also the case in college at Alabama. He became one of general manager John Lynch's draft crushes as he started scouting players for the 2017 draft. When Lynch would go to study Alabama's other defensive players, Foster's play kept distracting him.

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The 49ers loved Foster so much that when Lynch and head coach Kyle Shanahan saw a window of opportunity to trade back into the first round of April's draft and take the exciting player, they jumped at the chance.

Foster wasn't just impressive in college. He was fun to watch in high school too. As a senior at Auburn High, Foster recorded 80 tackles and two sacks. He participated in the 2013 Under Armour All-America Game and was named the game's defensive MVP.

Below is some of Foster's high school highlights, and it is worth a watch. It was brought to our attention by former 49ers best writer Kevin Jones, who posted it on Twitter.