We tested Becker's (1960) side-bet conceptualization of commitment within the context of Meyer and Allen's (1991) three-component model of organizational commitment. Employees (N=202) from various organizations completed a survey including measures of (a) seven categories of side bets (b) affective, normative, and continuance commitment, and (c) turnover intention. The findings provided strong support for Becker's theory. All seven side-bet categories correlated significantly with a revised measure of high-sacrifice continuance commitment, and structural equation modeling analyses revealed that the relations between the side bets and turnover intention were fully mediated by commitment. The findings also address issues pertaining to the dimensionality and measurement of continuance commitment, and help to explain relations among the three components of commitment.