leave (something) on the table
v. phr.— «(Fear of concussions) was a factor in retiring, but not the overriding factor.…I always wanted to leave something on the table. And when I retired, I always wanted to remember what I left on the table. I didn’t want anything jiggling around inside.» —“Moon: Trouble ahead?” USA Today Nov. 18, 1992. (source: Double-Tongued Dictionary)