gistfile1.txt

JSON:
[
    {
        team: {
            international_date: false,
            is_coed: false,
            team_name: "foo bar"
        }
    },
    {
        team: {
            international_date: false,
            is_coed: false,
            team_name: "foo bar"
        }
    }
]

C# Class:
[JsonObject("team")]
    public class Team
    {
        [JsonProperty("international_date")]
        public bool InternationalDate { get; set; }

        [JsonProperty("is_coed")]
        public bool IsCoed { get; set; }

        [JsonProperty("team_name")]
        public string TeamName { get; set; }
    }
    
Code:
List<Team> teams = (List<Team>) Newtonsoft.Json.JsonConvert.DeserializeObject<List<Team>>(data);

The JSON array is of anonymous objects each with a team object as a property. The list class needs to match, something like:

        [JsonObject("team")]
        public class Team
        {
            [JsonProperty("international_date")]
            public bool InternationalDate { get; set; }

            [JsonProperty("is_coed")]
            public bool IsCoed { get; set; }

            [JsonProperty("team_name")]
            public string TeamName { get; set; }
        }

        public class TeamWrapper
        {
            [JsonProperty("team")]
            public Team Team { get; set; }
        }
...
    List<TeamWrapper> teams = (List<TeamWrapper>)Newtonsoft.Json.JsonConvert.DeserializeObject<List<TeamWrapper>>(data);

Oops I see @aaronlerch had it already, sorry!