The bottom has fallen out for Kerry Wood, the Cubs' fireballing right-hander who won rookie- of-the-year honors last year. The 21-year old Wood is expected to be sidelined for at least the next 18 months, meaning memorabilia and cards from last year could drop in value should he not make a dramatic comeback. Already, a couple of endorsement deals Wood had lined up for this year have fallen through, further reducing his visibility.