Peyton Manning and Marvin Harrison Sr. were one of the best duos in the NFL during their playing days, and Manning met up with Harrison's son this week.

But Marvin Harrison Jr., their talented second-year wide receiver, is facing high expectations after an uneven, but promising, rookie campaign. His father, after all, is Marvin Harrison, the former wideout for the Indianapolis Colts back in the late 1990s and 2000s.

Arizona Cardinals wide receiver Marvin Harrison Jr. has been working all offseason to improve himself to be an optimal option in the team offense.