1. A method for providing a fantasy sports challenge to a plurality of users in which a performance of respective players is assessed in respective sports among a plurality of different sports, the method comprising: commencing, with a processor, the fantasy sports challenge by permitting the plurality of users using respective user computing devices to join the challenge; providing over a communication network to each of the plurality of users, a set of players, wherein each of the players in the set competes in a respective sport among the plurality of different sports; receiving from each of the users over the communication network, a respective roster comprising a selection of players among the set of players, wherein each roster includes a prescribed number of players selected without regard to the respective sport and a respective position, and wherein the respective rosters as between at least two of the users includes players from one or more of the plurality of the different sports; receiving performance data relating to each one of the players during a preceding event interval; calculating, with the processor, a respective player point value for each of the players based on the received performance data using a fantasy scoring methodology for the respective sport in which the player competes; converting, with the processor, each calculated player point value into a normalized value on a common point value scale by inputting each said calculated player point value into a plurality of piecewise-defined non-linear functions, wherein each of the piecewise defined non-linear functions is defined for a respective one of the plurality of sports; calculating, with the processor, a respective roster score for each user by aggregating the normalized values for each of the players on the roster of each user; ranking, with the processor, the plurality of users based on the calculated roster scores; and concluding the challenge by recording, with the processor in memory, one or more winners of the challenge based on the ranking; and providing the ranking to the plurality of users by the processor over a network.