Sphere is a three-dimensional bluff body which can be observed in various daily life and engineering applications. For example, in everyday life, people play many games such as cricket, football, golf and table tennis, where the body is spherical in shape. It also has various engineering applications, viz. particle-laden flow, combustion systems, transport processes, bearings and multiphase flows. In the present work, to examine the wall effect on wake and dynamic characteristics of a transversely rotating sphere, three-dimensional numerical computations are carried out on the flow past a transversely rotating sphere placed at varying gaps from a wall. An open-source software OpenFOAM (Open Source Field Operation and Manipulation) has been used to solve the governing equations. A Reynolds number (Re) of 300 has been chosen for the present study, which is defined based on the free stream velocity (U_∞) and the diameter of the sphere (D). Three values of the non-dimensional rotational speed (ω^*=ωD⁄(2U_∞ )), viz. -1, 0 and 1, have been chosen with ω as the dimensional rotation rate with anticlockwise rotation positive. Non-dimensional separation gap (G=g⁄D) between the sphere and the wall is varied from 0.25 to 3.0, where g is the dimensional gap. Iso-Q surfaces and the Z-vorticity contours help to illustrate the effect of wall on the vortical structures in the wake region. Hilbert Huang transform (HHT) analysis of the lift coefficient signals has been carried out to examine the wall effect on wake nonlinearity. Effect of G on Strouhal number, drag and lift forces for different values of ω^* (-1, 0 and 1) has also been presented. In addition, effect of rotational speed of the sphere on its wake and dynamic characteristics has also been demonstrated for G = 0.25 and G = 1.0.