Based on the context and the answer, generate a question. 

Context: Teaser : Detroit -- Placido Polanco had three RBI Wednesday and drove in the go - ahead run in the seventh inning to rally Detroit past the Los Angeles Angels 9 - 6 . Story : The Tigers scored four times in the last three innings to slow down the Angels ' sprint to the American League West title . Los Angeles ' magic number to clinch the division crown remained at seven .

Answer:

The number of games they need to win to finish in first



What does Los Angeles ' magic number refer to ?