Abstract: A sports bat system includes a bat body, a barrel end assembly and a handle end assembly. The bat body includes a barrel section and a handle section that is connected to the barrel section. The barrel end assembly is secured to the barrel section. The barrel end assembly can include a removable first weight. The handle end assembly is secured to the handle section. The handle end assembly can include a removable second weight. The first weight and the second weight can be interchangeable with one another. The barrel end assembly can include a first weight retainer that is fixedly secured to the barrel section and selectively retains the first weight. The sports bat system can also include plurality of removable first weights that are alternately retained by the first weight retainer. In some embodiments, each of the first weights can have a different mass from one another, can be the same size and shape as one another and/or can be formed from a different material from one another.