I was doing a question in Taylor book (example 3.3) where a sticky putty is thrown at a stationary wheel. To solve it we use conservation of angular momentum. What I am confused about is that the wheel is initially at rest and has no angular momentum initially. But when the putty is thrown at it the wheel starts spinning and gains angular momentum. Since angular momentum must be conserved (external torque is 0 so angular momentum conserved) there must be some inital angular momentum from the putty. So my question is even though the putty is thrown in a straight line and has no spin or rotational motion, it still posses angular momentum?