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Building depth is a key to constructing a strong fantasy football roster. A savvy owner does his homework and is aware of players who might not open the season as starters but could make an impact later in the year. Injuries or disappointing play by a starter could push a potentially productive backup into extensive action at any time. So here's an in-depth list of some projected reserves who could find themselves assuming larger roles for their respective NFL teams sometime during the 2006 fantasy football season. Also, be sure to consult our list of sleepers to see more NFL backups who could step forward this year.

Running Backs

Laurence Maroney, Patriots: The advancing age of Corey Dillon and the natural durability concerns about him are well-documented. Maroney could be needed to play often in his first pro season, and you can expect adequate fantasy numbers with some flashes of big-play ability if he is pressed into extra service. Maroney must learn to hit the hole with regular authority, and he might not be suited to running inside for positive yardage in his rookie campaign. But he can break loose for long runs and he might deliver a few impressive performances if he's needed to carry often. Don't expect consistency from Maroney, but he is a fine mid-round pick with definite upside. He just needs to add bulk and must become a more physical runner.

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