  This paper considers upper bounds on the oriented chromatic number
$\chi_o(G)$, of an oriented graph $G$ in terms of its $2$-dipath chromatic
number $\chi_2(G)$, degeneracy $d(G)$, and maximum degree $\Delta(G)$. In
particular, we show that for all graphs $G$ with $\chi_2(G) \leq k$ where $k
\geq 2$ and $d(G) \leq t$ where $t \geq \log_2(k)$, $\chi_o(G) = 33/10(k t^2
2^t)$. This improves an upper bound of MacGillivray, Raspaud, and Swartz of the
form $\chi_o(G) \leq 2^{\chi_2(G)} -1$ to a polynomial upper bound for many
classes of graphs, in particular, those with bounded degeneracy. Additionally,
we asymptotically improve bounds for the oriented chromatic number in terms of
maximum degree and degeneracy. For instance, we show that $\chi_o(G) \leq
(2\ln2 +o(1))\Delta^2 2^\Delta$ for all graphs, and $\chi_o(G) \leq
(2+o(1))\Delta d 2^d$ for graphs where degeneracy grows sublinearly in maximum
degree. Here the asypmtotics are in $\Delta$. The former improves the
asymptotics of a results by Kostochka, Sopena, and Zhu
\cite{kostochka1997acyclic}, while the latter improves the asymptotics of a
result by Aravind and Subramanian \cite{aravind2009forbidden}. Both
improvements are by a constant factor.
