This mechanism is called natural selection. In natural selection, specific circumstances in the environment allow a particular individual to survive and reproduce, passing its mutated genes on to the next generation. If nature is selecting, then God is not selecting. The two are at odds with each other. Either God designs the details, or nature shuffles the deck and natural selection chooses the winning hand.
Evolution is accidental, like a straight flush dealt to a poker rookie.
Theistic evolution means design by chance. Blending evolution with creation is like putting a square peg in a round hole. It just doesn't fit. Reproduction permitted for non-commercial use only.