Taking a break from watching the latest Indiana Jones movie Monday with his family, Keith Nelson discussed his son's decision to transfer from Utah State to BYU.

Riley Nelson, who became USU's starting quarterback during 2006 and then left on an LDS mission to Spain, on Monday notified the coaching staffs at both schools through e-mail that he will join Bronco Mendenhall's program next March.

"it actually happened very rapidly," his father said.

Upset at reports that he or Riley acted unethically or violated any NCAA rules, Keith broke down the timeline on his son's transfer.

In a period of "a month to six weeks," Keith said Riley's coach at Logan High, Mike Favero, asked Keith if his son would entertain potential scholarship offers from other schools. Keith said Favero had been discussing Riley's situation with BYU receivers coach Patrick Higgins, who recruits Cache Valley.

After talking with Favero, Keith contacted the Barcelona  mission president to receive permission to discuss the possibilties with Riley. During regular e-mail messages - which both sides receive on Mondays - Riley wrote that he would consider leaving USU.

In mid or early April, Keith said, Higgins and quarterback coach Brandon Doman offered Riley a scholarship through e-mail. Riley made a relatively quick decision, allowing him to eliminate distractions on his mission, Keith said.

"What the major factors are, I can't tell you," Keith said. "The only thing I know is Riley would leave no stone unturned."

Riley, who set a national record his senior year with 84 touchdowns (53 passing and 31 rushing) will have three years or eligibility left in addition to a redshirt season.

BYU starting quarterback Max Hall has two years of eligibility left. Quarterbacks Jason Munns and James Lark left for missions after last season.

Keith Nelson is scheduled be on 1320 KFAN at 8:10 a.m. Tuesday