It's never easy to make the adjustment from playing in college when you make it to the NFL. For some players, it takes multiple years to make an impact, even if they were stars in their days in NCAA.

Other players, however, just need a season to adapt to the perks and demands of being an NFL player. They bulk up during the summer and are more familiar with the system, so they're ready to shock the world in their second season.

We're predicting that to happen yet again in the 2021 NFL season. That's why today, we're going to let you know about 5 second-year players that are ready to break out and help you win your fantasy league.

NFL 2021: Top 5 Second-Year Breakout Candidates

5. Clyde Edwards-Helaire

Clyde Edwards-Helaire failed to make the impact everybody expected in his rookie season. The Kansas City Chiefs didn't exploit his pass-catching ability the same way it happened in LSU, and he wasn't much of a red-zone threat either.

But, now that he's fully healed and with the Chiefs expected to develop a more balanced approach in their offense next season, we can expect multiple 100+ yard performances from him in his sophomore year.

4. Antonio Gibson

Antonio Gibson was often overlooked last year. He had more receptions than rushing attempts in college and that's not always a good sign. However, he did prove to be an efficient dual-threat kind of back in his first season in the league.

The Washington Football Team will have an upgrade at the quarterback position thus opening up more lanes for Gibson's rushes. He looks ready to be a three-down back and eclipse the 1,000-yard mark once again.

3. Brandon Aiyuk

Brandon Aiyuk wasn't on many people's radar last season with George Kittle and Deebo Samuel stealing all the headlines. Then again, he took a major step forward for the injury-riddled San Francisco 49ers and proved his worth.

Now, Aiyuk is going to be more involved in the offense, and the fact that the rest of their weapons will also come back will defer plenty of defensive attention away from him. He's a big-play threat week in and week out.

2. J.K. Dobbins

J.K. Dobbins will be the lead back for the Baltimore Ravens even if they once again use a committee out of the backfield. He wasn't trusted early in his rookie season but proved to be an efficient, change-of-pace kind of back towards the end of the campaign.

Dobbins averaged nearly 6 yards per carry during the final nine weeks of the season, also tallying 7 rushing touchdowns and nearly 700 rushing yards. We expect those numbers to be way up in his second year in the league.

1. Joe Burrow

This is a bit of a no-brainer. Joe Burrow is a special talent and proved it right out of the gate before his season-ending injury. The Cincinnati Bengals did nothing to improve their offensive line to protect him but we still expect him to have an impressive season.

Burrow is now reunited with LSU standout Ja'Marr Chase, while Tee Higgins also looks poised to become a star. The Bengals have nice weapons and he's been a master out of the pocket, so - if they manage to keep him on the field - he'll throw for over 4,000 yards and 20 scores.