At the 2011 combine, 233-pound quarterback Blaine Gabbert had the fourth-longest broad jump, the fifth-fastest 40-yard dash and the sixth-highest vertical jump among the 17 quarterbacks who participated.

Surprised?

The 49ers offensive coaching staff has clearly been caught off guard by Gabbert’s athleticism. Perhaps you’ve heard?

“The one thing that jumped out right away was how athletic Blaine is,” Kelly said on KNBR in May. “I didn’t see -- we did not play against him while I was in Philly -- so this is really my first exposure to him. His athleticism is the first thing that jumped out at me.”

Said offensive coordinator Curtis Modkins last week: “One of the things that jumps out is that he’s very athletic. We brought Blaine in at Buffalo (before the 2011 draft) and had spent some time with him. I told our guys when we played them last year that I didn’t remember him being that fast and being that athletic. But that’s jumped out definitely.”

And quarterbacks coach Ryan Day on Tuesday: “I know coach (Kelly) talked about his athleticism (and) I felt the same way. I didn’t know he was as athletic as he was.”

The coaches were presumably a bit shocked when they studied video of Gabbert in 2015.

Gabbert (32 carries, 185 yards) had the second-longest run (44) on the team and his yards-per-carry average (5.8) ranked seventh among the 21 quarterbacks who had at least 30 carries last year.

It marked the first time in his five-year career Gabbert was able to showcase his mobility.

Consider: Gabbert’s 185 rushing yards in eight starts last year matched his total during his 27 starts with the Jaguars from 2011-13, when he averaged 2.5 yards per carry.

Kelly has often said a mobile quarterback is a benefit in his offense, but not a necessity. In his last two seasons with the Eagles, for example, Philadelphia’s quarterbacks rushed for 216 yards in 32 starts.

Of course, Gabbert won’t win the training-camp battle with the ultra-mobile Colin Kaepernick just because he possesses better-than-expected speed.

And Day, after noting his athleticism, said Gabbert can also do what quarterbacks must do in any offense.

“But throwing the ball, too,” Day said. “He can make all the throws that you need. He has a really good skill set and we’re excited about that moving forward.”

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A look at some of Gabbert’s results from the 2011 combine, where he was the fifth-heaviest (233 pounds) quarterback:

40-yard dash: 4.62 (tied for 5th among 17 QBs who ran)

Vertical jump: 33.5 (6th of 17)

Broad jump: 10-0 (T4 of 17)

20-yard shuttle: 4.26 (10th of 17)

Twitter: Eric_Branch