Complex sentence: On December 13,2015, Gillislee scored his first career touchdown in a game against the Philadelphia Eagles.On December 20,2015, he scored his second career touchdown against the Washington Redskins.
Split into simpler sentences: On December 13,2015, Gillislee scored his first career touchdown in a game against the Philadelphia Eagles. The following week, he scored his second career touchdown against the Washington Redskins.