Here, we report an operationally simple protocol for CEC reactions between aryl and alkyl halides by using a Ni catalyst, a radical generating Co co-catalyst and a weak homogeneous reductant (Figure ). The Co co-catalyst activates the alkyl halide, which allows for control of the concentration of the alkyl radical relative to the concentration of the LNi II (Ar)X intermediate (vide infra). The weak homogeneous reductant and generally low Ni loadings limit decomposition of LNi II (Ar)X. The reactions do not require additives and are easy to optimize because the product profile contains information about how to vary the ratio of the catalysts to promote radical capture at LNi II (Ar)X before its decomposition in catalysis. As a result, a wide range of aryl and alkyl halides can be coupled in high yield, including substrates that are rarely utilized in CEC, such as di-ortho-substituted arenes and a diverse array of medicinally relevant substrates. Further, we show that our general strategy can facilitate the discovery of novel reactions by performing a series of one-pot three-component dialkylations of bromo(iodo)arenes with two distinct alkyl electrophiles. Finally, owing to the wide range of transformations that propose radical capture at intermediates of the type LNi II (Ar)X, our general strategy of controlling key processes associated with this complex may be relevant to both improving a range of current reactions and developing new methods.