Recursive Linear Search

Consider the following recursive findPosition method. What is printed as a result of executing the code segment in the main method comment?

public int findPosition(int nums[], int key, int currentIndex) {
    if(currentIndex >= nums.length)
       return -1;
    if(nums[currentIndex] == key)
       return currentIndex;
    return findPosition(nums, key, currentIndex + 1);
}

// In main:
// int[] players = {3, 7, 9, 5, 9};
// System.out.println(findPosition(players, 9, 0));