Lee Mossop is good, but could he actually make an impact next year? Don't think he is physically developed enough, also big gap between under-18 rugby where he was very good and NL1. Lee did play a number of games for Wigan at under-21 level, but was not such an influence. Also think Lee is studying down Wigan way, so could be problems in him getting to training etc....
A better bet for a young second-row would be Ben Harrison from Warrington. Has been playing under-21 games. If we could persude Warrington to loan him for 12 months think he could be a great impact player for Haven off the bench.