Can I use two additional Apple Thunderbolt Displays at 60 Hz with my MacBook Pro Mid 2014?
According to Everymac


  This model supports a simultaneous maximum resolution up to 2560x1600 on two external displays via Thunderbolt. Alternately, it can support a single display up to 2560x1600 via Thunderbolt and a single 1080p display at up to 60 Hz, 3840x2160 at 30 Hz, or 4096x2160 at 24 Hz via HDMI.


…so I'd say 'yes'.