John Mara won't rule out Eli Manning as Giants QB in 2020Manning's contract expires at end of 2019 season3/25/2019, 3:06 AMOct 22, 2016; London, United Kingdom; New York Giants co-owner John Mara (left) and quarterback Eli Manning during NFL Fan Rally at the Victoria House prior to game 16 of the NFL International Series against the Los Angeles Rams. Mandatory Credit: Kirby Lee-USA TODAY Sports / Kirby Lee