You know Colin Kaepernick. You've read about NaVorro Bowman. You've seen Vernon Davis' diverse interests through his social-media channels. You know Joe Staley is funny. You know Anquan Boldin is serious.

The bottom line: You know a lot about the San Francisco 49ers.

You wouldn't be reading this on 49ers.com if that statement wasn't true.

But as is the case any year, there are always young NFL hopefuls looking to earn a spot on the 53-man roster. It's no different in 2015. The members of San Francisco's roster range from first-round draft picks to tryout players who impressed enough to earn a spot on the practice squad.

They all matter. They're all on the squad.

So with that in mind, let's get to know five lesser-known players on the 49ers roster who aim to make their dreams of making an NFL roster come true this summer.

WR Chuck Jacobs

The 6-foot, 178-pound receiver enters his third year with the club. Jacobs spent the 2013 season on the team's practice squad and was on injured reserve for all of 2014. Jacobs, a native of Richmond, Calif., was one of 13 children in his household, including seven sisters and six brothers. Jacobs went on to play at Utah State, catching 61 passes for 826 receiving yards and seven touchdowns. Jacobs caught a pair of touchdowns in the 2013 preseason, including a game-winning score to help the 49ers beat the Kansas City Chiefs on the road. In San Francisco's preseason opener against the Baltimore Ravens last season, Jacobs suffered a torn ACL on a kickoff return. Jacobs has since spent the past seven months vigorously rehabbing his injury.

CB Cameron Fuller

Like Jacobs, this 49ers cornerback is also no stranger to the Bay Area.  Fuller is also a native of Richmond, although he attended high school at Berkeley High School, while Jacobs attended Kennedy High School. Fuller (5-foot-10, 178 pounds) went undrafted in 2014 after a two-year career at New Mexico State (20 games, 51 tackles and seven pass breakups in two seasons) by way of a year at Contra Costa College (second-team all-league with 21 tackles, three interceptions, one touchdown return and 13 pass breakups). Fuller was signed to the team's practice squad on Dec. 16 and was promoted to the team's active roster 10 days later in time for a Week 17 home victory over the Arizona Cardinals. Fuller was active for the game, but he did not register any snaps. Fuller recently appeared on KNBR to tell his story of how he impressed the 49ers brass during a workout. "It was all surreal," Fuller said. "I really felt my life change."

G Fouimalo Fonoti

The 6-foot-4, 310-pound offensive lineman is one of nine undrafted players in 2014 to remain on the team's current roster. Fonoti, who goes by "Fou," was waived injured last July after suffering a significant knee injury. Fonoti went unclaimed and spent the entire season on San Francisco's IR. Before signing with the 49ers after the draft, Fonoti started in 24 games for the Michigan State Spartans. He played right tackle in all 14 games as a senior and was an honorable mention All-Big Ten selection. Fonoti hails from Lakewood, Calif., and was a JUCO All-American selection for Cerritos College in Norwalk, Calif., before transferring to East Lansing. While he's not getting ready for the 2015 season, Fonoti apparently enjoys shopping at Anthropologie for his fiancée.

#TheColossalCandle @Anthropologie my fiancée is in love with this! pic.twitter.com/mdivO3vDet — Fou Fonoti (@FeeFiFou) March 3, 2015

NT Garrison Smith

This 6-foot-1, 300-pound defensive lineman was signed by the 49ers on Dec. 23 to the practice squad. A week later, Smith was brought back on a reserve/future contract along with four other players. Smith was originally signed as an undrafted free agent by the Miami Dolphins on May, 12. He was on Miami's practice squad for five days in September and was later picked up by the New Orleans Saints for a near month-long stint on the practice squad. Smith attended the University of Georgia, where he played four seasons in the SEC. He started in 13 games as a senior and was named to the SEC's Academic Honor Roll. A native of Atlanta, Smith majored in history at UGA, and he continues to be a big supporter of all things Georgia.

TE Xavier Grimble

The former USC Trojan, who finished his college career with 44 catches, 460 receiving yards and nine touchdowns, is on his second stint with the 49ers. The 6-foot-5, 255-pound tight originally signed as an undrafted rookie with the New York Giants, but he was released after training camp on Aug. 26. San Francisco signed Grimble to the practice squad, where he practiced with the team from Sept. 15 to Nov. 18, when he was released in favor of cornerback Marcus Cromartie. Grimble, however, was brought back to the 49ers on Dec. 16, and he stayed for the remainder of the season. Grimble was also signed to a reserve/future contract at the end of the regular season.  Grimble is a native of Las Vegas and starred at well-known high school football powerhouse Bishop Gorman.