desean jackson is known to bet large on nfl games, look for players with big entourages as manipulaters. i think a total would be easier to manipulate than pt spread, see ref or coach more than a player, especially football where they only play 1 side of the ball on a 53 yd wide field
sports easily manipulated think 1 on 1, tennis, mma, golf h2h matchup. i say golf because they have the most gamblers, close to 100pct wager on course. tennis who is the jurisdiction in an international sport?
Goalies in hockey and soccer.
Home plate umpires
Table tennis now by far the worst which obv falls in line to what you are saying. Add that they don't get paid much and it increases the oppourtunity of match fixing as the betting markets on these sports grow.
Jockeys.
Not to win a race on a longshot but to lose a race aboard a heavy favorite.
don king