The synthesis of several nickel(II) and manganese(II) alkyl complexes supported by hydrotris(3-phenyl-5-methylpyrazolyl)borate (Tp^Ph,Me) ligand is reported. The metal halide complexes Tp^Ph,MeMnCl(CH₃CN) (1) and Tp^Ph,MeNiCl (4) were used as precursors for synthesis of Tp^Ph,MeMnCH₂Si(Me)₃ (2), Tp^Ph,MeMnCH₂Ph (3), Tp^Ph,MeNiCH₂Si(Me)₃ (5) and Tp^Ph,MeNiCH₂Ph (6). The resulting Mn(II) and Ni(II) alkyl complexes, 2–3 and 5–6, were characterized by X-ray crystallography, NMR spectroscopy, and FT-IR spectroscopy. X-ray crystallographic analysis revealed distorted tetrahedral geometries for complexes 2–3 and 5 with a κ³-Tp^Ph,Me. Complex 6, on the other hand, was found to have a distorted square planar geometry with κ²-Tp^Ph,Me and an η³-benzyl ligand. Transformations of 4 and Tp^Ph,MeCoCl (10) via treatment with NaN₃ to yield Tp^Ph,MeNiN₃ (11), Tp^Ph,MeCoN₃ (12), along with the synthesis of (Tp^Ph,Me)₂Ni (8) and Tp^Ph,MeNiCl(3-Ph-5MepzH) (9) are also reported.