PHOENIX, Ariz. (AZCENTRAL/USA TODAY NETWORK) -- Six months after receiving a signing bonus of about $5 million, Diamondbacks first-rounder Pavin Smith put that money to good use on Christmas.

As a "thank you for raising (him) in a great home filled with love," Smith paid off his family's mortgage.

"Because of all the sacrifices you made to get me where I am, I want our family home to be yours," Smith wrote in a letter to his parents.

Smith tweeted a video of his mother and father crying as his mother read the letter on Monday.

The Diamondbacks selected Smith, a first baseman at Virginia, with the seventh overall pick in June's MLB draft. Smith hit .342/.427/.570 with 13 homers while striking out only 12 times in 228 at-bats.

When he signed with the Diamondbacks in June, Smith received a bonus of $5,016,300, which is the full slot value for where he was selected at No. 7 overall.