Jackson sharp during drill
That is tempered by the fact that he didn't do that against the starters, who picked off Brooks Bollinger (Chad Greenway hauled in a tipped ball).
In other developments, rookie Aundrae Allison left the field, walking gingerly. Also, Chester Taylor and Ben Leber are among the players not at practice.
Bryant McKinnie, though, did take part in his first 2007 training camp practice.