Spencer Paysinger ran with the starting defense on the first day of training camp. He knows that might not last.
"They say that when it comes to the depth chart, it can change any day and that we dictate how the depth chart goes," Paysinger said. "If one person has a great day, he might be going with the 'ones.' If a person slips up a little bit, he might be going with the 'twos' and 'threes.' We have to know our stuff and go out there and perform."
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With no incumbent, the field is wide open.
"The days of etched-in-stone linebacker positions going into training camp are gone for us right now," Paysinger said.
The first starting group included Paysinger, Mark Herzlich and Keith Rivers. Jacquian Williams, Dan Connor and Aaron Curry ran with the second unit. Curry left the field midway through practice -- Tom Coughlin said he had cramping issues -- and was replaced by Kyle Bosworth.
Any of those seven players could wind up starting for the Giants. Some, such as Rivers and Curry, are former first-rounders and the most highly-touted linebackers to come out of college in the last decade. Others, such as Paysinger and Herzlich, came into the league undrafted.