R. Scott Clark has a 9-part series on Paedobaptism that is quite helpful. Here is the portion of the first installment:
Is Infant Baptism Protestant?
In short, yes. All the Protestant Reformers including Martin Luther, Huldrych Zwingli and John Calvin held to infant baptism. Though these three great Protestants disagreed on many things, they all agreed on the Protestant doctrine of justification by grace alone, through faith alone, in Christ alone. They also agreed that infant baptism is a biblical practice and the best expression of the Protestant gospel.8 In fact, infant baptism has been the practice of the historic Christian church since the Apostolic period.9 Of course the historic practice of the church does not settle the question. Historic practice, however, suggests a certain presumption in favor of infant baptism. Nevertheless, tradition alone is not sufficient reason for any practice in the church. Therefore Reformed Christians practice covenant baptism because we are commanded to do so in both the Old and New Covenant Scriptures. 10