Speak with them separately, and Andrew Greene and Nate Davis are two large, imposing figures who are serious about their football.
Get them together, however, and they are like a couple of brothers who can't stop laughing, making fun of each other and talking in unison.
There's a reason for their close bond, which also happens to be the main reason why they will both be wearing the Blue and Gold of the Winnipeg Blue Bombers this season.
It was the fall of 1991 when Davis, a 17-year-old high school defensive tackle, went to Indiana University on a recruiting trip. His player host for the weekend was none other than Greene, an offensive lineman for the Hoosiers.
Greene's parting words that weekend for Davis, who would go on to commit to Indiana, were, "Come in shape for the run test." Davis could tell from Greene's tone of voice that he wasn't messing around.
"Yes, but I was (messing around), and I paid for it," Davis said with a laugh. "That was the first time, and pretty much since then if he has something to say, I listen to him a little closer."
The pair spent three seasons together at Indiana. Greene graduated in 1994 and went off to the NFL. Davis graduated two years later and did the same.
They didn't keep in touch during their NFL days, but Greene called Davis in 2001 with another piece of advice: Come to Canada. Greene was in his third season with the Saskatchewan Roughriders, and then-GM Roy Shivers was attempting to lure Davis to Regina.
When that didn't work, Greene got on the horn.
"Before I came up here I was kind of lost," Davis said. "I didn't know exactly what I was doing in life. When he called and said 'If you want to come up here and you want to work and you want to do the things that we can do, you can dominate the D-line and I can dominate the O-line.' That was the plan."
The plan worked, as Greene was the CFL's offensive lineman of the year in 2003 and Davis was a CFL all-star at tackle in 2004.
Their days in Regina came to an end at the same time this off-season, and Bombers GM Brendan Taman was more than willing to pick them up.
"We like playing together. We like working together," said Davis, who thinks of Greene as a big brother. "So if it was possible, we were going to -- at least I was going to -- see if I could make it happen again."
Greene signed with the Bombers on Feb. 21, and Davis signed on the dotted line 27 days later.
This will mark their 10th season together as teammates, which means it's also the 10th year that they've been lining up against one another in practice -- Davis at tackle and Greene at right guard.
"To be able to play this long with one of your best friends," said Davis. "It's really nice. It's been a blessing for me."