Teenagers. At times tantalizing with their on-field potential, at others frustrating with their youthful mistakes. While they’re certainly prone to inconsistency, there are quite a few teens in MLS who are providing plenty of hope for the future of their clubs.

Here are the top five from the 2017 season who will surely have people talking in the year to come:

Perhaps the best teen in all of MLS, the New York Red Bulls’ Adams was excellent in 2017. The 18-year-old midfielder/defender emerged as a solid option in central midfield and one of the best right wing backs in the league this season, starting 24 regular season games and all three playoff matches for head coach Jesse Marsch.

"I literally can envision him in playing in any of the 10 spots. Maybe not goalkeeper." -Jesse Marsch said, smiling, about Tyler Adams#RBNY — New York Red Bulls (@NewYorkRedBulls) November 8, 2017

The Red Bulls’ Homegrown starred with the US Under-20s at the FIFA U-20 World Cup, and got his first shot with the USMNT in their friendly at Portugal in November. Barring something catastrophic, it’ll likely be the first of many call-ups for Adams. He’s got the juice to be one of the best players in MLS and one of the top options in the US pool for years to come.

Already a full Venezuelan international and signed to a deal with Manchester City, Herrera is the only teenager in MLS who can realistically claim to be ahead of Adams. The 19-year-old box-to-box midfielder beat out Andrea Pirlo for a starting job in NYCFC’s midfield about two months into the season and never looked back, sandwiching 14 starts around a Bronze Ball-winning performance at the U-20 World Cup.

A bulldog in defense and a smooth player in possession, it looks like Herrera will return to the Bronx in 2018 on (perhaps) another loan from Manchester City. If he is back, he should be a huge asset for Patrick Vieira and NYCFC.

Just one part of Real Salt Lake’s promising young core, Acosta locked down the club’s starting left back spot over the second half of the season. Like Adams and Herrera, the Honduran-born US youth international’s overall appearance total (he made 17, with 16 starts) was cut into by the U-20 World Cup, but he started seven of the club’s eight final games during their desperate playoff run.

He’s clean on the ball, a solid 1-v-1 defender and, as he showed against Seattle, pretty fearless for a young kid.

El jugador de los @SoundersFC @clint_dempsey furioso tras la derrota de su equipo..... por su parte @dannyacosta117 feliz por la victoria pic.twitter.com/zGa6woyrCX — Francisco Vazquez (@franvamo) September 24, 2017

He should be a solid MLS option for years to come.

The Vancouver Whitecaps wunderkind didn’t hit expectations on the club level this season, but that doesn’t mean the 16-year-old Davies doesn’t have plenty of talent. He showed a bit of that on the international level, where he tied for the tournament lead with three goals to help Canada to the quarterfinals of this summer’s CONCACAF Gold Cup. Hopefully he gets more minutes next year, and hopefully we start seeing some of that form in MLS.

Tabla’s year started on a promising note, but took a bit of a step back after the 18-year-old started making noise about wanting out of Montreal. He made only five appearances after the start of August, though he did record two goals and two assists in 21 overall regular season appearances for the Impact. He clearly has plenty of talent and has reportedly caught the eye of several big European clubs. If he’s to make a dent at that level, however, he’ll have to do more with his potential in 2018.