A small number of reserve jurors will be selected Tuesday for the trial of Aaron Hernandez, in the event any of the 16 seated jurors are excused from service before Wednesday.
Lawyers' opening statements and prosecution testimony are currently expected Wednesday morning.
Two final jurors were chosen Monday in Suffolk Superior Court in Massachusetts.
Sixteen people, including four alternates, will hear the case.
Hernandez, a former tight end for the New England Patriots, is charged in the 2012 fatal shootings of Daniel de Abreu and Safiro Furtado, whom he encountered at a Boston nightclub.
Prosecutors have said Hernandez became enraged when one of the men accidentally bumped into him at the club, causing him to spill his drink. Hernandez is accused of opening fire on their car at a stoplight.
Hernandez has pleaded not guilty. He is already serving a life sentence in the 2013 killing of Odin Lloyd, a semi-professional football player.