The Leopards (2-5) overcame an early 12-9 deficit and surged ahead with a 19-2 run fueled by two Seth Hinrichs 3-pointers as well as four free throws and a layup by Lindner.
Wagner (4-5) fought back early in the second half and closed within four on a three-point play by Kenneth Ortiz, but Lafayette answered with a 14-5 run to make the score 54-41.
The Seahawks couldn't pull closer than six as Lafayette drained late 11 free throws to hold the lead.
Lindner missed just one of his 14 attempts from the foul line and Hinrichs and Dan Trist each scored 12 points for the Leopards.
Leaving early for the NBA is a risky decision. Some players -- Skal Labissiere, Dejounte Murray -- slid in the draft. Some -- Isaiah Taylor, Troy Williams -- weren't drafted at all.
College basketball coaches across the country will hit the recruiting trail hard in July to target the Class of 2017's top prospects. Which players are the nation's top programs targeting?
The Tar Heels could lose Justin Jackson and Kennedy Meeks after next season. Coach Roy Williams has nearly every top-10 2017 prospect on his board.