Experienced central defender Alan Sheehan has joined Northampton Town on an appearance-based contract.
The Cobblers become the 34-year-old's 12th club in a 17-year professional career which started with Leicester.
He left Lincoln in the summer, having previously won back-to-back promotions with Luton and is reunited with Keith Curle at the Cobblers having played under the manager at Notts County.
"He is an influential figure, a leader, an excellent character," said Curle.
"He has very high standards, he is a good organiser and an excellent example to other players around him. We have signed a top professional, an organiser and someone who I feel will be of benefit to us."
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