mere luck

Jim is no one special, someone who survived by mere luck, but he wears that like a burden.

She soon realized that had been mere luck.

In this way, mere luck could pay tribute to the virtues that make dreams come true.

Mere luck, though, could also be playing a part.

The Cubs have thus far avoided any positive tests, a development outfielder Kyle Schwarber insists cannot be attributed to mere luck.