Abstract: A ball bat extending about a longitudinal axis. The bat includes a handle and a barrel portion having an outer surface and including a proximal member and a distal member. The proximal member has first and second end regions and the distal member has third and fourth end regions. The first end region is coupled to the handle portion, the second end region of the proximal member is coupled to the third end region of the distal member, and the fourth end region of the distal member is coupled to an end cap. The proximal and distal members are formed of first and second materials, respectively. The second material is a fiber composite material, the second fiber composite material of the distal member is co-molded to the outer surface of the second end region of the proximal member.

Abstract: A baseball capable of being tested under ASTM F1887-09 wherein the baseball is projected at a strike plate at a speed of approximately 60 mph to measure the COR of the baseball. The baseball includes a core formed of a diene-based rubber composition, at least one layer of yarn surrounding the core, and a cover assembly surrounding the one layer of yarn. The core has a diameter of less than 2.0 inches and a weight less than 1.5 ounces. The baseball has a circumference of less than 9.5 inches and a weight of less than 5.5 ounces. The baseball has an initial COR value when tested in accordance with ASTM F1887-09 and a second COR value measured after the baseball has undergone at least 60 impacts of approximately 60 mph against the strike plate. The second COR value is greater than 95 percent of the initial COR value.

Abstract: A ball bat extending about a longitudinal axis. The bat includes a handle and a barrel portion having an outer surface and including a proximal member and a distal member. The proximal member has first and second end regions and the distal member has third and fourth end regions. The first end region is coupled to the handle portion, the second end region of the proximal member is coupled to the third end region of the distal member, and the fourth end region of the distal member is coupled to an end cap. The proximal and distal members are formed of first and second materials, respectively. The second material is a fiber composite material, the second fiber composite material of the distal member is co-molded to the outer surface of the second end region of the proximal member.

Abstract: A ball bat extending about a longitudinal axis. A bat includes a tubular bat frame. The bat frame includes first and second frame pieces. The first frame piece has a gripping portion integrally formed to a transition portion, and the transition portion has a distal end region. The second frame piece has a proximal end region. The distal end region of the first piece is coupled to the proximal end region of the second piece. One of the distal and proximal end regions overlaps the other of the distal and proximal end regions. The bat has a center of percussion, and the mid-length of the overlap of the distal and proximal end regions is positioned within plus or minus three inches of the center of percussion of the bat.

Abstract: A ball bat extending about a longitudinal axis. The bat includes a handle and a barrel portion. The barrel portion has an outer surface and includes a proximal member and a distal member. The proximal member has first and second end regions and the distal member has third and fourth end regions. The first end region is coupled to the handle portion, the second end region of the proximal member is coupled to the third end region of the distal member, and the fourth end region of the distal member is coupled to an end cap. At least a portion of each of the proximal and distal members defines the outer surface of the barrel portion. One of the second and third end regions overlaps the other of the second and third end regions.