In three seasons as an NFL head coach, Jim Harbaugh has proven at least one thing: He knows a good Mountain West quarterback when he sees one.

Take former Utah quarterback Alex Smith for example. When Harbaugh arrived in San Francisco in 2011, Smith had already been with the 49ers for five pretty unsuccessful seasons. Before Harbaugh's arrival, Smith went 19-31 in 50 starts.

Instead of dumping Smith right away though, Harbaugh kept him around for two seasons and the former No. 1 overall pick went 19-5-1 in 25 starts under Harbaugh. And just in case you're wondering, during Smith's college years, Utah was in the Mountain West.

In 2011, the 49ers coach plucked former Nevada quarterback Colin Kaepernick out of the second round of the NFL Draft.

This year, Harbaugh thinks there's another Mountain West quarterback who could do some damage in the NFL: Former San Jose State quarterback David Fales.

"I'm a big fan," Harbaugh said of Fales, via the San Jose Mercury News. "My personal quarterback evaluation of this class has David in the top five."

Harbaugh didn't list his top-five, but he did list the reasons why he likes Fales.

"I think he sees the field. I think he throws the ball downfield," Harbaugh said. "A lot of quarterbacks are doing what they're taught in their systems. He's a guy that is an example of a quarterback who throws to the outside lanes. He throws the ball in the seams and gets it downfield and sees the field well. He's got a real savviness about the position."

In CBSSports.com's latest draft rankings, Fales is currently listed as the 10th best quarterback available. One of the knocks on Fales is his arm strength, but Harbaugh didn't see that while watching him at the 49ers' local Pro Day on Friday.